How much kinetic energy to kill a deer

The data looks fairly linear with a slope of 0.548. This means that if I pulled back the string and used 100 Joules of work, about 54.8 Joules would go into the kinetic energy of the arrow. But ...

Mar 3, 2019. Messages. 4. My total arrow weight with the 125gr. Broadhead weighs 428 gr. Our shots have been perfect broadside shots, but only punching through one side and not both. I have looking at the Full Metal Jacket 400 @ 10.2 GPI. Which would bring m up to 465g or go to to FMJ 340 @ 11.3GPI and be at 497gr.But it all hinged on the kinetic energy transfer theory, which turns out to be incorrect. Where it All Goes Wrong. From at least the late 1800s through the Vietnam War, everyone assumed the kinetic energy transfer model was correct. The "shock" of getting hit by a fast-moving projectile and absorbing its kinetic energy contributed to ...At reasonable straight-wall cartridge hunting distances, for both velocity and trajectory, there is no real out-and-out winner between .450 Bushmaster vs .350 Legend. Both shed velocity like mad, the Legend losing 29-percent of its muzzle velocity at the 200-yard mark and the Bushmaster 31 percent—1,648 fps and 1,515 fps respectively.Kinetic energy is calculated as half of the object's mass multiplied by the velocity squared. My people carrier weighs about 2 tonnes. Travelling at 100 kilometres per hour, it has approximately ...Black Powder - How much energy for deer? - I got an Omega and shoot 250 grain SST's with 100 grains of Pyrodex. In the paper that comes with the SSTs, it says with 100 grains at 200 yards the bullet has 975 ft lbs of energy. I have heard that 1000 ft lbs is the minimum for deer. Is 975 enough to kill a deer or should IOne other thing about comparing rifle cartridges to pistol cartridges, as far as ranges go, rifles usually carry way too much energy for their own good-what I mean by this is a .30-06 or a .300win mag can easily kill a deer at 1000yrds, but there are about 6 guys (non-military) in the world that could make that shot under hunting conditions ...

If the potential accelerating the electrons is 10,000 volts (we say 10 kilovolts (KV) ), how much kinetic energy in joules does one electron have as it leaves the "gun" on its way to the screen? How fast is that electron going, as a fraction of the speed of light? How long would it take to go 25 cm from the gun to the screen?A knock on mechanical heads has always been penetration and a loss of kinetic energy upon impact. Bowhunters get worried about the shoulder. ... speed and know the kinetic energy your bow/arrow combo delivers, you can kill any animal in North America with a mechanical head. When you shoot a SEVR, you get extreme aerodynamics and a swept-back ...The initial K.E. generated at the shot is 71.53 ft./lbs. (To determine how much initial kinetic energy your own bow-and-arrow set-up has at the shot, the formula is which is arrow weight (mass) x velocity squared, divided by 450,240.) Most experienced bear hunters I know believe that for averaged-sized bears taken at reasonable ranges—under ...All but the .243 are still carrying the generally accepted 1,000 ft.-lbs. of energy necessary to kill a deer out to 500 yards, which I grant you is farther than we have any business shooting at deer-size gam. At the far more practical distance of 300 yards, which is still a long shot, every cartridge on that list will kill a deer, antelope or ...With the general rule of thumb being 1500 ft lbs of energy at impact, hunters need to carefully select their ammunition to meet this standard. By using the appropriate bullet, hunters can ensure a clean and effective kill, while also respecting the animal and the principles of ethical hunting.Summary. If you don't care about hitting a target, a powerful modern crossbow can shoot as far as 500 yards. If you want to hunt, up to 80 yards is possible for a very skilled shooter, however you should stick to a maximum of 60 yards, and preferably much less than that (30-35) if you are a beginner. For target practice, everything will ...To score an instant kill with the usual deer rifle, exact bullet placement is required in a vulnerable area. The required degree of bullet placement will vary almost directly in proportion to the size and life tenacity of the animal, but will be somewhat inversely proportional to the striking energy and momentum of the bullet provided that expansion and penetration are uniformly balanced.

Question: 3. When you apply the brakes of your car, the brake pads rub together and the frictional forces do negative work and remove the car's kinetic energy, but heat up in the process. Suppose we have a car where the brake pads have a combined mass of 8.0kg and are made of a material with a specific heat capacity of 840J/kg*c.The .350 Legend gets the job done, but if you want to cleanly, quickly, and humanely drop game animals at 200 to 300 yards, the .450 Bushmaster is a better option. .45-70 Government vs. 450 Bushmaster. Bullet Size: 300 grain. Muzzle Velocity: 1,880 fps. Muzzle Energy: 2,355 foot-pounds.For instance, Hornady's popular 250-grain 20-gauge SST sabot slug produces 1,200 foot/pounds of energy at 100 yards, 983 foot-pounds (ft.-lbs.) at 150 yards, but then tails off to 815 ft-lbs at 200. Many state DNRs recommend 1,000 ft.-lbs. of energy at the target to anchor a deer, but there's no data that has shown that to be the benchmark.Michelle's Hoyt Trykon Sport, the one she used to kill the hog, is set at 40 pounds and has a draw length of just 23 inches. It launches a 320-grain carbon arrow/broadhead at 198 fps and produces about 28 pounds of kinetic energy. That's pretty light, but it's obviously enough to bring down a big hog and a whitetail.

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The cartridges we use will kill at tremendous distances. I witnessed a deer killed at over 2100 yards with a lead tipped 175 gr bullet from a 7 Rem mag. There were 4 sighters taken at the end of a log before shooting at the deer. The deer dropped like hit with the hammer of Thor.Venison is an excellent and healthy meat, and we should treat deer carcasses as food products throughout the whole process. All stalkers must be capable of removing all internal organs (gralloching) and inspecting a deer carcass. ... Min muzzle energy: Red, Fallow and Sika England & Wales n/a: Not less than .240 inches: 1,700 foot pounds ...In hunting, how much damage a bullet does is more important than its toughness. A bullet that sheds weight and deforms chaotically causes more damage. Conventional mono-metal bullets dump about 50% of their energy in the first 8 inches. Traditional cup-and-core and lead core dump about 80%. Somewhere along the way, the notion that you can ...A car of mass m slides on frictionless ice with velocity 2v. it collides with a truck of mass 2m that slide on the same ice with velocity v directed in the opposite direction. The car and truck stick together after the collision. how much kinetic energy is lost in the collison? There are 3 steps to solve this one.

An air-track cart with mass m1=0.28kg and initial speed v0=0.80m/s collides with and sticks to a second cart that is at rest initially. Part A If the mass of the second cart is m2=0.53kg, how much kinetic energy is lost as a result of the collision? Express your answer to two significant figures and include appropriate units.A coffee filter of mass 1.2 grams dropped from a height of 4 m reaches the ground with a speed of 0.8 m/s. How much kinetic energy Kair did the air molecules gain from the falling coffee filter? Start from the Energy Principle, and choose as the system the coffee filter, the Earth, and the air. There are 2 steps to solve this one. Expert-verified.Depending on the bow you use and the arrows you use, your kinetic energy could range from 30 foot pounds at 30 yards to almost 125 foot pounds at 30 yards. …The Deer Hunting is Located in 1017 Cambridge Court, Paris, AR, Arkansas, 72855. Telephone +479-963-8187, [email protected] is a great feature to have on anyhow and the fact that this is a budget Bow, it makes it that much better! Accuracy & Power. The Barnett Recruit Recurve Bow shoots arrows at a speed of 245-FPS with 65-Lbs of Kinetic Energy! This crossbow is great for target shooting, Bow fishing, Hunting small Game, and Even Deer Hunting!Because there are so many factors at play, it’s hard to say with 100% certainty which arrow setups will penetrate a deer's shoulder every time. However, let's call out a few examples of modern-day arrow setups that are very likely to penetrate the scapula. Take the average male bowhunter shooting a roughly 70-pound bow, with about a 28 …Measuring kinetic energy is how most bowhunters determine an arrow's killing potential. The number is arrived at by multiplying speed squared by arrow mass and dividing the resulting figure by 250,240. ... you can't beat a whitetail to the jump. A fast arrow travels around 300 fps, but sound travels at about 1,225 fps. And whitetail's reaction ...there are blank different crystal systems. 7. what info would you have to determine the toughness of a solid? how much kinetic energy it absorbed before it broke. which of the following is most likely to be found in crystalline form? quartz. which of the following are mechanical properties of solids?

The critical factor to consider is the kinetic energy (foot-pounds) your bullet will strike the coyote with upon impact. For simplicity, I use the often suggested minimum of 10 ft/lb per pound to create a lethal hit on a coyote. In the United States, the average weight of a coyote is 30lbs. At 10 ft/lb per pound, that means you should use a ...

a) Using law of conservation of momentum m1*u1 = (m1+m2)*v …. A 25,000 kg freight car is coasting at 0.650 m/s with negligible friction under a hopper that dumps 100,000 kg of scrap metal into it. What is the final velocity (in m/s) of the loaded freight car? (Enter the magnitude.) How much kinetic energy (in J) is lost?My (very general) rule of thumb, is that I like a 15-20 fpe gun for squirrel and cottontail, crows and smaller game, a 30-40 fpe gun for turkey, fox, raccoons, a 100-150 fpe gun for small antelope, coyote, bobcat, and a 200 - 400 fpe gun for deer, hogs, warthog, larger antelope, etc. But depending on the situation; such as the need to limit ...The efficient killing of deer-size game, taken-as-they-come, is supposed to be dependent on a striking energy of at least 1000 ft/lbs, with wapiti requiring at least 1500 ft/lbs. ... The most reliable observers of killing power have concluded that kinetic energy is what determines a bullet’s total destructive ability – in volume of tissue ...What amount of kinetic energy does it take to break bones / kill people with blunt force such as stone shot? Discussion/Question I recently read about Balearic slingers who could supposedly throw volleys of stone shots up to 400 meters distance Here I was able to find a video from Tod's Workshop where he measures the speed and provides the ...7.3 Work-Energy Theorem. (a) Calculate the force needed to bring a 950-kg car to rest from a speed of 90.0 km/h in a distance of 120 m (a fairly typical distance for a non-panic stop). (b) Suppose instead the car hits a concrete abutment at full speed and is brought to a stop in 2.00 m. Calculate the force exerted on the car and compare it with ...May 28, 2022 · The effective range for a crossbow is the same as most compound bows: 40 yards. This is the distance over which the majority of bowhunters can repeatedly make a successful lethal shot. Much of this depends on accuracy. It's difficult to hit the kill zone the farther away the target is. We can solve o ly one question. So I am solving the question first. A1 kg skate rat drops from the top of a 3 m high half-pipe ramp. Ignoring friction, how much Kinetic Energy would s/he have at the lowest point of the ramp? 300 Joules 30 Joules 100 Joules 3 Joules Ignoring friction, what would be the velocity of the skate rat in the question ...

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The arrow’s weight and construction: The combination of draw weight and arrow weight affects the kinetic energy delivered on impact. The arrow should be matched to the draw weight to optimize performance.What you will gain with a 70# bow over a 60# bow is about 20-25 fps depending on the bow. You will also gain 10-13 lbs. of Kinetic Energy. Example of a bow i set up. 29/70 375 gr. arrow at 327 fps = 89 lbs. of KE. 29/60 375 gr. arrow at 302 fps = 75.9 lbs. of KE.Generally, 40-60 pounds of kinetic energy and 12-14 inches of arrow penetration are needed to kill a deer in an effective way. Well, here I am sharing some …Apr 20, 2021 · The unofficial rule regarding minimum KE to push an arrow through a deer is about 40 foot-pounds. Lower-poundage bows are slower than higher-poundage models. So, let’s say the bow is pushing a 350-grain arrow at 265 feet per second. That setup is delivering roughly 54 foot-pounds of KE and .411 slugs of momentum. Feb 4, 2005 · placed. 2500 ft/lbs is recommended for animals weighing 1500 pounds and 4000 ft/lbs + for. dangerous game for obvious reasons. The main thing is to use a bullet at or above it's designed velocity and energy so as to get the. best performance from it under ALL hunting conditions. So to sum it up if you are hunting deer. However, with increased speed comes greater vibration and wear and tear on the bow. To use another African example, a crossbow shooting a 500 grain arrow at 350 fps developes about 100 foot-pounds of kinetic energy, sufficient go-power to hunt Cape buffalo or elephant in a compound bow. Granted, no elephants are likely to be passing your ...There are, however, three popular myths. Myth: Crossbows generate outlandish amounts of kinetic energy compared to compounds. Fact: Math is math-The average crossbow generates roughly 80 to 100 foot-pounds of kinetic energy. A crossbow developing 300 feet per second (fps) with a 420-grain arrow generates 86.78 foot-pounds of kinetic energy.A chronograph can be used to measure speed or can be obtained from the manufacturer. Once these figures are known, multi- ply velocity X velocity X total arrow weight in grains, and then divide that figure by 450,340 to obtain kinetic energy in foot-pounds. The weight of crossbow arrows is designated in grains.Jul 11, 2017 · The venerable Remington 165-grain Core-Lokt in 30-06 Springfield generates 2870 foot-pounds of KE at 2800 feet-per-second with momentum of 2.050 slug fps. This is 41 times the KE, but only 4.3 times the momentum of a 350-grain arrow at 300 fps (70 ft-lbs / 0.469 slugs). This illustrates a significant difference in how bullets and arrows kill. ….

Physics. Physics questions and answers. An object, with mass m and speed v relative to an observer, explodes into two pieces, one three times as massive as the other; the explosion takes place in deep space. The less massive piece stops relative to the observer. How much kinetic energy is added to the system during the explosion, as measured in ...Again, after using the car crash calculator, you can obtain the average impact force of about 2.5 k N 2.5\ \mathrm{kN} 2.5 kN, which is almost 25 times smaller than without the seat belt.It corresponds to a weight of 1.24 t 1.24\ \mathrm{t} 1.24 t.The stopping time lengthens to 48 m s 48\ \mathrm{ms} 48 ms, and now, the driver decelerates "only" 18 times faster than with Earth's standard ...Kinetic Energy is the energy an object has owing to its motion. In classical mechanics, kinetic energy (KE) is equal to half of an object's mass (1/2*m) multiplied by the velocity squared. For example, if a an object with a mass of 10 kg (m = 10 kg) is moving at a velocity of 5 meters per second (v = 5 m/s), the kinetic energy is equal to 125 ...The efficient killing of deer-size game, taken-as-they-come, is supposed to be dependent on a striking energy of at least 1000 ft/lbs, with wapiti requiring at least 1500 ft/lbs. ... The most reliable observers of killing power have concluded that kinetic energy is what determines a bullet’s total destructive ability – in volume of tissue ...The kinetic energy formula works in classical physics, but it starts to deviate from true energy when the velocity approaches the speed of light (c). How to Calculate Kinetic Energy. The key to solving kinetic energy problems is to remember that 1 joule equals 1 kg⋅m 2 ⋅s −2. Speed is the magnitude of velocity, so you can use it in the ...The highest velocity came from the "BMK 19"-0.18 inch (4.5 mm) air rifle with a velocity of 886 ft/s (270 m/s) and carrying an initial kinetic energy of 12.19 ft-lb (16.58 J). Depending on pellet type used, this led to penetration of a pellet into ballistics gelatin between 1.97 inches and 3.7 inches (50 mm and 94 mm) when fired from 65.6 ...Speed alone is not a good indicator of a bows ability to harvest an animal. The question you should be asking is "how much kinetic energy do I need to humanely harvest a deer?" The general answer to that is something around 45 ft/lbs. Kinetic energy is a factor of the speed and weight of the arrow. The amount of KE produced is easily … Michelle's Hoyt Trykon Sport, the one she used to kill the hog, is set at 40 pounds and has a draw length of just 23 inches. It launches a 320-grain carbon arrow/broadhead at 198 fps and produces about 28 pounds of kinetic energy. That's pretty light, but it's obviously enough to bring down a big hog and a whitetail. How much kinetic energy to kill a deer, A 35-45 psi overpressure may cause 1% fatalities, and 55 to 65 psi overpressure may cause 99% fatalities. (Glasstone and Dolan, 1977; TM 5-1300, 1990) BTW, damage in Humans mainly occurs at the interface of areas of different density eg lungs and eardrums. It is essentially a spallation effect like Newton's Cradle in tissue., (Use M, v_1 for v1, and v_2 for v2 as appropriate.)(b) How much kinetic energy is lost in the. A railroad car of mass M moving at a speed v1 collides and couples with two coupled railroad cars, each of the same mass M and moving in the same direction at a speed v2., At 50 yards, the .357 mag has 478 ft/lbs. of bullet energy. That's about where the 9mm starts out. In fact, the first 50 yards of 9mm ballistics is pretty much the same as the .357 is from 50 to 100 yards. Now, if the 357 has enough energy to kill a deer between 50 and 100 yards, the 9mm has enough energy to take a deer up to 50., A coffee filter of mass 1.2 grams dropped from a height of 4 m reaches the ground with a speed of 0.8 m/s. How much kinetic energy Kair did the air molecules gain from the falling coffee filter? Start from the Energy Principle, and choose as the system the coffee filter, the Earth, and the air. There are 2 steps to solve this one. Expert-verified., In an experimental technique for treating deep tumors, unstable positively charged pions (π + , elementary particles with a mass of 2.25×10−28kg) penetrate the flesh and disintegrate at the tumor site, releasing energy to kill cancer cells.If pions with a kinetic energy of 12 keV are required and if a velocity selector with an electric field strength of 1.5×10 3 V/m is used, what must be ..., The driver of a car slams on her brakes to avoid colliding with a deer crossing the highway. What happens to the car's kinetic energy as it comes to rest? Science. Physics. ... A 20 G bullet is fired from a gun at 1:25 m/s how much kinetic energy does it have. A: GivenMass of bullet is M=20gSpeed of bullet is V=125m/s ..., Sectional density: .287. Muzzle velocity: 2650 fps. Velocity at 100 yards: 2450 fps. Energy at 100 yards: 1865 ft. lbs. Those ballistics are an example of what you should be seeking in a good deer cartridge. More powerful "all-around" cartridges, such as the .270 Winchester, .308 Winchester and .30-06, are certainly capable deer killers, but ..., The kinetic energy of the arrow leaving the bow increased from 73.3-77.9 ft·lb., a mere 6% increase. A >200% increase in arrow mass yielded a <10% increase in kinetic energy. For all practical purposes, arrow mass does not affect arrow kinetic energy when the two arrows are fired from the same bow., Kinetic energy of an arrow can be found by using the formula KE=(mv²)/450,240 where m = mass of the arrow in grains and v = velocity of the arrow in fps. If your bow setup ultimately shoots a 400 grain arrow at a respectable 250 fps (a typical field-output for a modern rig), your actual kinetic energy or "power" will be: KE=(mv²)/450240, Kinetic energy is energy in motion. A 150-grain bullet standing still has potential energy. Dropped, it has a bit of kinetic energy, and you’ll feel this should it land on your naked toe. Push this same bullet with about 50 grains of Hodgdon 4350 powder behind it, and you won’t want to feel it on your toe or anyplace else. It will be ..., Choose your crossbow to shoot your hunting arrow with an initial velocity of a minimum of 250 to 300 FPS (Feet Per Second). By producing that speed, the arrow will get enough kinetic energy to kill any big game animal cleanly and also eliminates the long-range arrow trajectory problem. Weight. Choosing a crossbow based on weight is never easy., Kinetic energy is the only type of energy capable of killing a deer. The amount of energy required to kill a deer depends on a multitude of factors including the size of the deer, type of ammunition, and distance of the shot. Generally, a rifle chambered in .30-06 caliber and shooting a 180 grain bullet with a muzzle velocity of 2,500 feet per ..., 1. Baseball. A baseball has a mass of 145 grams. How much kinetic energy does this ball have when thrown at 42.2 m/sec?, Dec 3, 2020 ... Piles of deer have been killed effectively with a 40# traditional bow. As with any weapon you need to know the max distance you can hit a deer ..., Kinetic energy equals velocity squared, multiplied by mass, divided by 450,240. The sum equals the kinetic energy — a.k.a. KE in foot pounds — of an object in motion. ... Just as you can cleanly kill deer with a .22 Hornet, you can also kill elk with wide-cutting mechanicals and light arrows — if everything proceeds according to script ..., 21 yrs. as a lodge owner/10,000 customer shots fired/ 7,100 deer/hog kills-speed+shot placement (shoulder)+correct bullet type=dead animal. Lots having guided elk, deer, bear, and goat hunters for 20 years I prefer lead bullets of heavier weight in magnum caliber. Ultra mags 338 ect have too much recoil for the average hunter., how many people would think of shooting a deer or moose at 600 yards. ... When I was much younger I made a super kill ... Kinetic energy by its very ..., to kill an animal you're looking for kinetic energy. I think the rule of thumb is 1000 ft-lbs of energy should be the minimum. So a 130 gr .277 caliber bullet with a muzzle velocity of 3000 fps has about 2600 ft-lbs of kE. A 170 gr bullet out of a 30-30 Win with a muzzle velocity of 2200 fps has about 1830 ft-lbs. Both are enough to kill a deer., What this data translates to is that while .410 slugs may provide sufficient energy within 50 yards, beyond that its efficacy begins to drop dramatically. In fact, according to some ballistician's recommendation of a minimum 1,000 foot-pounds of energy to ethically kill a deer, the .410 is inadequate even at the muzzle., Also, deer are out of season here .... Shot a bison this weekend with a handgun generating all of 882 ft-lbs of muzzle energy..... a 440 grain bullet, rated at 950 fps muzzle velocity. You can check the Beartooth kinetic energy calculater and verify these figures, but it comes to exactly 882 ft-lbs., Depending on the bow you use and the arrows you use, your kinetic energy could range from 30 foot pounds at 30 yards to almost 125 foot pounds at 30 yards. …, 1 / 4. Find step-by-step Physical science solutions and your answer to the following textbook question: A .15-kg ball is thrown into the air and rises to a height of 20.0 m. How much kinetic energy did the ball initially have?., The initial K.E. generated at the shot is 71.53 ft./lbs. (To determine how much initial kinetic energy your own bow-and-arrow set-up has at the shot, the formula is which is arrow weight (mass) x velocity squared, divided by 450,240. Most experienced bear hunters I know believe that for averaged-sized bears taken at reasonable ranges — under ..., Question: 3. When you apply the brakes of your car, the brake pads rub together and the frictional forces do negative work and remove the car's kinetic energy, but heat up in the process. Suppose we have a car where the brake pads have a combined mass of 8.0kg and are made of a material with a specific heat capacity of 840J/kg*c., Here are the values for 70 mph (31 m/s) and 85 mph (38 m/s) Ok, I am happy. First, this is the acceleration at the maximum compression for a spring. However, my special spring doesn't bounce back ..., When it comes to bows, energy is stored in the limbs and cams when the bow is drawn, then transferred to the arrow shaft at the shot in the form of kinetic energy, or K.E. My 28½-inch Easton 4mm FMJ shaft tipped with a 100-grain broadhead weighs in at 380 grains – a medium-weight shaft that will produce enough K.E. and momentum when …, At 50 yards downrange, a typical .357 Mag. bullet is traveling about 1,100 feet per second. That is 750 mph. Despite its power, recoil is more manageable with the .357 Mag. than with the .44 Mag., as the latter requires a bit of masochism if you are to enjoy even a half-hour shooting session., In fact, the average crossbow generates about 80 to 100 FP KE, or foot-pounds of kinetic energy. If you see a crossbow with a 300 FPS using a 400-grain arrow, then you'll generate about 76 FP KE. If you are hunting large game, then your arrow has to be traveling faster. However, it's really the FPS at the time of impact that matters., The kinetic energy of the projectile drops dramatically the further downrange it travels primarily due to energy lost in the form of heat generated by friction against the air itself. ... but in most states, it's illegal to use a .22LR for deer hunting. This is because the .22LR has too low of impact energy to kill a deer humanely and quickly ..., However, with increased speed comes greater vibration and wear and tear on the bow. To use another African example, a crossbow shooting a 500 grain arrow at 350 fps developes about 100 foot-pounds of kinetic energy, sufficient go-power to hunt Cape buffalo or elephant in a compound bow. Granted, no elephants are likely to be passing your ..., Seems the answer is 1300 KE when the round hits the deer. That's not at the muzzle. I don't see any PCP rifles that are any where close to that. I know people are taking deer with thier PCPs. Arkansas law says, "40-caliber, produce at least 400 ft. lbs. of energy". Guess that's a start., The “best” deer bullet for .243 Win rifles is a 100 grain bullet in a cartridge containing enough powder to propel that bullet/projectile roughly 2900-3000 feet per second (fps). At that bullet weight and projectile velocity, enough kinetic energy is available to make clean reliable kills out to 400 yards. But this isn’t the entire story., Advanced Physics questions and answers. A 2 kg toy car sits at the highest point of a 13 m high hill. The car is gently pushed forward until it begins to roll down the slope. Assuming the car coasts freely, without any friction or air resistance, how much kinetic energy (KE) and potential encrgy (PE) will it have at each of the indicated points ...