1. physics

    a runner in the starting blocks is it a potential energy or a kinetic energy?

    asked by Vanessa on October 27, 2010
  2. physics

    When you drop a marble does all of it's potential energy turn into kinetic energy or just some of it?

    asked by Nicole on May 2, 2010
  3. physics

    It has been said that sometimes lead bullets melt upon impact. Assume that a bullet with an initial temperature of 301 K receives 73.9 % of the work done on it by a wall on impact as an increase in internal energy. (The melting point of lead is 601 K, the

    asked by Anonymous on November 5, 2014
  4. physics

    It has been said that sometimes lead bullets melt upon impact. Assume that a bullet with an initial temperature of 295 K receives 73.5 % of the work done on it by a wall on impact as an increase in internal energy. (The melting point of lead is 601 K, the

    asked by Anonymous on November 12, 2014
  5. Science

    Compare how much kinetic energy and potential energy the ball has at each point and describe why the ball has that energy

    asked by Brandon on January 17, 2013
  6. algebra

    a long distance runer started running a course, running at an average speed of 2 mph. 1.33 hrs later, a cyclist travelde the same course at an average speed of 4 mph. how many hrs after the runner started did the cyclist overtake the runner? round answer

    asked by tina on February 2, 2008
  7. science

    The driver of an 800.0 kg car decides to double the speed from 25.0 m/s to 50.0 m/s. What effect would this have on the amount of work required to stop the car, that is, on the kinetic energy of the car?

    asked by veeda on June 29, 2013
  8. Math

    a dog kennel charges $40 to board a dog for one night and $35 per night each night after that. Henry paid a total of 215 for dog boarding. for how many nights did henry board his dog?

    asked by Anonymous on January 22, 2018
  9. Physics- drwls please help

    (a) Calculate the kinetic energy that the earth has because of its rotation about its own axis. Assume that the earth is a uniform sphere and that its path around the sun is circular. For comparison, the total energy used in the United States in one year

    asked by Jim on March 28, 2007
  10. aig math (Ms.Sue)

    At the pet store ruth bought 5 rawhide bones and 3 dog collars.She gave the cashier 90$ and received $6 in chage.If a dog collar costs 3 times as much as a bone find the cost of one dog collar. My answer is 63 am i right if not please show me why and how.

    asked by lidia on September 10, 2012
  11. physics

    Determine whether each statement below is true or false. The force necessary to lift an object is its mass times g. Kinetic energy is the energy of motion. Stopping distance is doubled, if speed is doubled. Work is the product of force and time. A joule is

    asked by confused on October 16, 2014
  12. Physics

    A 20.0 kg cart is moving with a velocity of 7.30 m/s down a level hallway. A constant force of -11.0 N acts on the cart and its velocity becomes 3.50 m/s. a) What is the change in kinetic energy of the cart? b) How much work was done on the cart? c) How

    asked by Einstein on November 16, 2007
  13. physics

    a 2.1 gram bullet is shot into a tree stump. Just before it hits the stump the bullet is moving at 280 m/s. The bullet penetrates into the tree and comes to a rest after having gone 5.1 cm into the tree a.What was the initial kinetic energy of the bullet

    asked by kathy on January 10, 2010
  14. Physics: true or false

    1. In a gas kept at a constant temperature, all molecules move with the same speed. A. True B. False 2. A hot object has more thermal energy than a similar cold object only because of greater kinetic energy. A. True B. False 3. The thermal energy of the

    asked by sophie on April 3, 2009
  15. chemistry

    The kinetic energy of a rolling billiard ball is given by {\rm{KE}} = 1/2\,mv^2 . Suppose a 0.17-{\rm kg} billiard ball is rolling down a pool table with an initial speed of 4.5 m/s. As it travels, it loses some of its energy as heat. The ball slows down

    asked by john on March 4, 2010
  16. statitics

    Approximately 40% of all U.S. households own at least one dog (according to the humane society). Suppose 15 households are randomly selected for a pet ownership survey. a. What is the probability that exactly eight of the households have at least one dog?

    asked by Anonymous on October 17, 2010
  17. physics

    An older-model car accelerates from 0 to speed v in 10. s. A newer, more powerful sports car of the same mass accelerates from 0 to 4v in the same time period. Assuming the energy coming from the engine appears only as kinetic energy of the cars, compare

    asked by sherry on March 3, 2016
  18. physics (fixed)

    Two air-track carts move toward one another on an air track. Cart 1 has a mass of 0.34 kg and a speed of 1.1 m/s . Cart 2 has a mass of 0.68 kg and a speed of 0.55 m/s. Calculate the system's kinetic energy.

    asked by Kyle on March 17, 2010
  19. PHYSICS 1

    When a pitcher throws a curve ball, the ball is given a fairly rapid spin. A 0.15 kg baseball with a radius of 3.7 cm is thrown with a linear speed of 41 m/s and an angular speed of 37 rad/s. Assume that the ball is a uniform, solid sphere. (b) Calculate

    asked by kelsey on October 20, 2008
  20. principles of physics

    Temperature is distinguished from heat when we note that whereas temperature is ____________________. A) None of these.B) measured in degrees, heat is measured in units of energy.C) a measure of average translational kinetic energy per molecule, heat is

    asked by Kristie on March 24, 2012
  21. physics

    Temperature is distinguished from heat when we note that whereas temperature is ____________________. A) None of these.B) measured in degrees, heat is measured in units of energy.C) a measure of average translational kinetic energy per molecule, heat is

    asked by Kristie on March 24, 2012
  22. physics

    1. Temperature is distinguished from heat when we note that whereas temperature is ____________________. A) None of these.B) measured in degrees, heat is measured in units of energy.C) a measure of average translational kinetic energy per molecule, heat is

    asked by Kristie on March 25, 2012
  23. English

    1. I have a dog, Lucky. He is cute. 2. I have a dog, Lucky. She is cute. 3. I have a dog, Lucky. It is cute. [Can we use all the expressions? Which one is commonly used?] 4. I have a dog who is very smart. 5. I have a dog which is very smart. 6. I have a

    asked by rfvv on March 1, 2019
  24. Physics

    What is his kinetic energy when his potential energy reduces to 1000 J? Express your answer to two significant figures and include the appropriate units

    asked by Anonymous on March 10, 2014
  25. Physics

    A pole vaulter has 3500J of energy when he crosses a bar 7 metres high. How much kinetic energy will he have before he reaches the ground?

    asked by Kyawt on February 13, 2016
  26. PHYSICS PLS GUYSS

    What does the slope of a Kinetic Energy V.S Gravitational Potential Energy graph represent? I found 1 but I don't know what it represents I know that PE+KE=constant

    asked by Amelie on April 5, 2016
  27. Physics

    2. A body fired vertically up reaches a maximum height of 120 m. The location at which the kinetic energy is 75% of the potential energy is...

    asked by Jay on June 14, 2012
  28. college mathematics

    8. Determine which, if any, of the three statements are equivalent. Give a reason for your conclusion. Show complete work. I.) If the dog wags its tail, then the dog is not calm. II.) Either the dog does not wag its tail or the dog is not calm. III.) If

    asked by cody on February 7, 2012
  29. Physics

    An electron is accelerated from rest through a potential difference of 1.40*10^5 V. What is its speed? So there were also two parts before to this question: the relativistic kinetic energy in eV (which I correctly found to be just 1.40*10^5 eV) and its

    asked by Kid on December 9, 2017
  30. Physics

    You observe someone pulling a block of mass 48 kg across a low-friction surface. While they pull a distance of 3.0 m in the direction of motion, the speed of the block changes from 4.9 m/s to 7.7 m/s. Calculate the magnitude of the force exerted by the

    asked by Amelie on April 14, 2011
  31. physics

    You observe someone pulling a block of mass 48 kg across a low-friction surface. While they pull a distance of 3.0 m in the direction of motion, the speed of the block changes from 4.9 m/s to 7.7 m/s. Calculate the magnitude of the force exerted by the

    asked by Amelie on April 14, 2011
  32. physics

    It has been said that sometimes lead bullets melt upon impact. Assume that a bullet with an initial temperature of 301 K receives 67.9 % of the work done on it by a wall on impact as an increase in internal energy. (The melting point of lead is 601 K, the

    asked by mehmet kaya on November 18, 2014
  33. math

    braden bought 4 packs of dog treats. he gave 4 treats to his neighbor's dog. now braden has 24 treats left for his dog. how many dog treats were in each pack?

    asked by renan on January 28, 2014
  34. science

    Potential to Kinetic or Kinetic to Potential. Describe an example of energy conversion that occurs during the activity. Playing in a rock band?

    asked by Anonymous on December 3, 2009
  35. physics

    Let a force of 1500 Newtons act through a distance of 200 meters on a 1500 kg car which starts from rest. a. What is the work done? b. What is the final velocity? c. What is the car's momentum? d. What is the car's change in momentum? e. What is the car's

    asked by Ryan on November 14, 2011
  36. science

    an oil tanker has a mass of 100 000 tonnes. its kinetic energy is 200 MJ.Calculate its speed. (1Tonne=1000kg, 1 MJ= 1 Megajoule= 1 000 000 J) PLEASE HELP

    asked by jessy on November 30, 2011
  37. Physics

    A solid cylinder of mass 20 kg rotates about its axis with angular speed of 100 rad/sec. the radius of the cylinder is 0.25m. what is the kinetic energy of the cylinder?

    asked by Devnet on December 5, 2014
  38. Science

    A lead bullet with a mass of 8.50 g traveling at 4.80 x 102 m/s strikes a 2.00 kg block of wood and is embedded in it. Both the bullet and the block are initially at 25.0°C. Assume that no heat is lost to the surroundings and that all the kinetic energy

    asked by Michael on December 6, 2011
  39. PHYSICS

    A 1250 KG wrecking ball is lifted to a height of 12.7 m above its resting point . When the wrecking ball is released, its swings toward an abandoned building and makes an indentation of 43.7 cm in the wall. A) What is the potential energy of the wrecking

    asked by Jon on January 22, 2015
  40. Physics

    A person pushes with a horizontal force of 25 N 4kg block, initially at rest on a horizontal table, a distance of 3m. The coefficient of kinetic friction between the block and table is 0.35. determine external work on the block-table system. the energy

    asked by Star on April 16, 2014
  41. Math

    Pete and jan compete as a team in a biathlon. Pete runs at a speed of 9 km/ h for x hours. Jan cycles at twice Pete's running speed for 1 hour and 30 minutes. The total distance of the biathlon is 42 km. Find, in hour and minutes, Pete's running time.

    asked by Ephraim on May 26, 2008
  42. Physics

    A 15500 N automobile travels at a speed of 41 km/h northward along a street, and a 7000 N sports car travels at a speed of 65 km/h eastward along an intersecting street. a)If neither driver brakes and the cars collide at the intersection and lock bumpers,

    asked by Kelsey on December 11, 2010
  43. science

    what is the kinetic energy, in J, of a)an Ar atom moving w/ a speed of 650m/s b)a mole of Ar atoms moving w/ a speed of 650m/s? a) K.E. = (1/2) M V^2 For M, use the mass of an Argon atom. It equals 0.040 kg (40 g) divided by Avogadro's number. M must be in

    asked by michelle on January 8, 2007
  44. physics

    A body of mass 6kg, initially moving with speed 12m/s, experiences a constant retarding force of 10 newtons for 3 seconds. Find the kinetic energy of the body at the end of this time.

    asked by nerd on January 10, 2011
  45. physics

    A body of mass 6kg, initially moving with speed 12m/s, experiences a constant retarding force of 10 newtons for 3 seconds. Find the kinetic energy of the body at the end of this time.

    asked by nerd on January 10, 2011
  46. physics

    A simple Atwood's machine uses two masses, m1 and m2. Starting from rest, the speed of the two masses is 7.0 m/s at the end of 5.0 s. At that instant, the kinetic energy of the system is 100 J and each mass has moved a distance of 17.5 m. Determine the

    asked by john on March 21, 2012
  47. physics

    A body of mass 6kg, initially moving with speed 12m/s, experiences a constant retarding force of 10 newtons for 3 seconds. Find the kinetic energy of the body at the end of this time.

    asked by nerd on January 10, 2011
  48. physics

    A body of mass 6kg, initially moving with speed 12m/s, experiences a constant retarding force of 10 newtons for 3 seconds. Find the kinetic energy of the body at the end of this time.

    asked by nerd on January 10, 2011
  49. physics

    A body of mass 6kg, initially moving with speed 12m/s, experiences a constant retarding force of 10 newtons for 3 seconds. Find the kinetic energy of the body at the end of this time.

    asked by nerd on January 10, 2011
  50. physics

    A body of mass 6kg, initially moving with speed 12m/s, experiences a constant retarding force of 10 newtons for 3 seconds. Find the kinetic energy of the body at the end of this time.

    asked by nerd on January 10, 2011
  51. Gas Laws and Energy

    I have another question. I've tried it and i keep getting it wrong. The average kinetic energy of a 1.85-g sample of argon gas in a 3.00-L bulb is 1.28e-22 J/atom. What is the pressure of the gas? What is the root mean square velocity of the argon atoms

    asked by Jay on March 2, 2007
  52. physics

    when you dive from atop a tall flagpole into a swimming pool below. His potential energy at the top is 14000 J (relative to the surface of the pool).What is his kinetic energy when his potential energy reduces to 1000 J?

    asked by Mrs G on March 3, 2012
  53. Science

    Which choice most accurately explains what happens to the bonds between atoms when water changes to steam, and what becomes of the energy added during this phase change? A. When water changes to steam bonds between molecules break apart. After reaching the

    asked by Dean on April 2, 2019
  54. behavior problems ( dogs)

    Please check my answer thanks Your new client has a nine-month-old, neutered male Anatolian Shepherd Dog. She would like your help with a behavior problem. Each night, after she lets the dog out to eliminate, he refuses to come back in. She has ended up

    asked by Kai on October 6, 2008
  55. physics # 3

    3. In a perfectly inelastic collision which of the following is conserved, (give the most accurate answer). a.) Linear momentum b.) Kinetic energy c.) Linear momentum d.) Total mechanical energy, (KE +PE) e.) Heat energy

    asked by gomez on August 7, 2007
  56. Physics

    A steel ball has a mass of 4.0kg and rolls along a smooth, level surface at 62m/s. A) Find its kinetic energy(i got this and its 7688 joules) B)?????-At first, the ball was at rest on the surface. A constant force acted on it through a distance of 22

    asked by URGENT!!!!PLEASE on November 23, 2008
  57. PHYSICS answer check

    a gun converts 200J of stored energy into kinetic energy of the 0.02kg bullet. a)What is the speed of the bullet as it leaves the gun? b)If the gun is fired straight up, how high will the bullet go? a)200J b)m*g*h= (0.02kg)(10m/s^2)=200J h=100m

    asked by MJW on April 25, 2015
  58. physics

    A 7.0 kg bundle starts up a 44° incline with 140 J of kinetic energy. How far will it slide up the incline if the coefficient of kinetic friction between

    asked by Anonymous on October 17, 2010
  59. Science

    1) What subatomic particles are located in the nucleus and have no effect on the charge of the atom? a) Protons and neutrons b) Electrons c) Neutrons d) Protons 2) The electron can be found in what location of an atom? a) Orbit b) Center c) Attached to

    asked by megan on October 5, 2017
  60. Physics

    True or False: If no friction forces are present the work done by a force on an object increases either its kinetic energy or its potential energy.

    asked by David on December 13, 2011
  61. Physics

    The motion of a block-spring system is described by x(t) = A sin(ùt). Find ù, if the potential energy equals the kinetic energy at t = 6.11 s. I'm really not sure how to solve this. It seems that you need more information, either x or A? I appreciate any

    asked by Bruce on July 13, 2012
  62. physics

    an object is thrown upward with an initial velocity 'u' m/s. derive an expression for the height 'h' at which its kinetic energy becomes equal to its potential energy.

    asked by Annointed Jesu on May 5, 2013
  63. physics

    On a slide a child has a potential energy that decreases by 1000 J while her kinetic erergy increases by 900 J. What other form of energy is involved and how much?

    asked by sarah on March 2, 2009
  64. Little star

    The potential energy of a projectile at it's maximum height is equal to it's kinetic energy there if the velocity of projection is 20m/s it's time of flight

    asked by Sravya reddy on July 14, 2017
  65. Science

    The potential energy of a projectile at its maximum height is equal to its kinetic energy there . If the velocity of projection is 20m/s its time of flight is ?

    asked by Ruby on July 19, 2016
  66. Science

    A ball bounces up 28 centimeters after being dropped from a height of 2 meters. What percent of the potential energy is converted into kinetic energy on the bounce?

    asked by Jada on December 1, 2011
  67. Physics

    Physics Help!!!!! Maximum Kinetic Energy based on a graph? A 2.50kg ball is attached to an unknown spring and allowed to oscillate. The figure shows a graph of the ball’s position x as a function of time t.(Figure 1) Part A: What is the maximum kinetic

    asked by Darren on May 1, 2013
  68. physics

    what is the graph of potential energy and kinetic energy against distance?

    asked by edward on September 21, 2012
  69. physics

    Friction converts kinetic energy to potential energy?

    asked by y912f on February 23, 2009
  70. Mechanics

    A 500kg spaceship is in a circular orbit of radius 2Re above the earth a.how much energy is required to transfer the spaceship to a circular orbit of radius 4Re. b.discuss the change in potential energy,kinetic energy and the total energy of the system

    asked by Och on January 17, 2016
  71. Econ MC

    Dick owns a dog whose barking annoys Dick's neighbor Jane. Dick receives personal benefit from owning the dog, and Jane bears a cost of Dick's ownership of the dog. Assuming Dick has the legal right to keep the dog, which of the following choices are true?

    asked by Econ on April 17, 2007
  72. English

    Rewrite the following sentences in order to correct the punctuation. In the morning Shelby ate a peanut butter sandwich and an apple she rode her bike to school. After running the half marathon; Amelia was too tired to walk her dog.

    asked by Rachel on December 9, 2014
  73. physics

    With brakes fully applied, a 1660 kg car decelerates from a speed of 74.0 km/hr. What is the work done by the braking force in bringing the car to a stop? What is the change in the kinetic energy of the car?

    asked by Katie on February 17, 2012
  74. physics

    With brakes fully applied, a 1660 kg car decelerates from a speed of 74.0 km/hr. What is the work done by the braking force in bringing the car to a stop? What is the change in the kinetic energy of the car?

    asked by Katie on February 20, 2012
  75. physics

    The mass of a carbon atom is 2 x 10 ^ -26. What is the kinetic energy of a carbon atom moving with a speed of 500 m/s? I got 2.5 x 10^-21 which is correct. The second question states: Two carbon atoms are joined by a spring-like carbon-carbon bond. The

    asked by Julia on November 30, 2009
  76. Physics

    A metal ball of mass 2kg is allowed to fall freely from rest from height of 5m. Calculate potential energy it possesses and kinetic energy before it reaches the ground. What happens to mechanical energy of the ball after it hits the ground?

    asked by Angela on February 2, 2016
  77. science energy

    A stone held above the ground has potential energy. When the stone is dropped, potential energy is converted to _________ energy. A. kinetic B. thermal C. chemical D. electrical

    asked by ej on January 31, 2018
  78. Gen Chem

    Light of wavelength 272 nm shines on a piece of magnesium metal. What is the speed of the ejected electron? (Light energy greater than that of the work function of magnesium ends up as kinetic energy of the ejected electron. The work function is the

    asked by Z on January 18, 2010
  79. Algebra

    The kinetic energy(K) of an object is dependent on its mass(m) and velocity(v) and is given by the equation K=.5mv^2. If an object has a velocity of 5 and a kinetic energy of 75, what is its mass?

    asked by Vanessa on July 27, 2012
  80. Physics Work and Energy, Momentum

    Let g be the acceleration due to gravity at the surface of a planet of radius R. Which of the following is a dimensionally correct formula for the minimum kinetic energy K that a projectile of mass m must have at the planet's surface if the projectile is

    asked by Kelly on May 13, 2007
  81. physics

    A skier is gliding along at 1.13 m/s on horizontal, frictionless snow. He suddenly starts down a 13.1° incline. His speed at the bottom is 18.8 m/s. What is the length of the incline? ------------------------------------ Use his change in kinetic energy

    asked by Vishnu on October 8, 2008
  82. physics

    A block is moving down an incline a distance of 5 m form point A to point B by a force F that is parallel to the incline and has magnitude 2 N. The magnitude of the frictional force acting on the block is 10 N. If the kinetic energy of the block increases

    asked by Brian on January 10, 2007
  83. Physics

    You are riding a bicycle at a speed of 15 m/s. The bycicle has tires with diameters measuring 630 mm. You can approximate each tire as a solid cyllinder (to calculate inertia) with a mass of 0.5 kg. What is the total rotational kinetic energy of the

    asked by paige on April 8, 2011
  84. Physics

    You are riding a bicycle at a speed of 15 m/s. The bycicle has tires with diameters measuring 630 mm. You can approximate each tire as a solid cyllinder (to calculate inertia) with a mass of 0.5 kg. What is the total rotational kinetic energy of the

    asked by Anonymous on April 6, 2011
  85. physics

    a dog runs down his driveway with an initial velocity of 4.0 m/s. the dog then accelerates at 2.5 m/s^2 for 5.0 s. what is the final velocity of the dog?

    asked by LUIS on September 22, 2011
  86. math

    a dog eats 3/4 of dog food for each meal. if he has 7 2/4lbs of food. how many meals can he feed his dog.

    asked by lissa on September 14, 2016
  87. Physics

    OK, so I'm having some serious problems with this one question. It's on relativity. Here it is: Calculate the mass of a proton (m0 = 1.67E-27 kg) whose kinetic energy is one sixth its total energy. How fast is it traveling? THANKS!!

    asked by Marissa on April 19, 2009
  88. college physics

    Calculate the ratio (pure number) of the kinetic energy to the potential energy of a simple harmonic oscillator when its displacement is half its amplitude

    asked by olivia ware on June 29, 2011
  89. physics

    need help on this three part one its about inelastic collisions momentum and energy related with work Find the speed at which Superman (mass=76.0 kg) must fly into a train (mass = 17620 kg) traveling at 60.0 km/hr to stop it. Running into the train at that

    asked by kdhgwiu on February 26, 2008
  90. Physics

    A 1.20kg ball is rolled down a frictionless ramp whose top is 0.80m above a horizontal spring with ks = 800N/m. The ball reaches the horizontal just in front of the spring. a.) What is the kinetic energy of the ball just before it contacts the spring? b.)

    asked by Lauren on July 18, 2012
  91. physical science B

    I have to build a roller coaster with 3 hills. Hill A is 15 inches high,it drops down to 3 inches, rises to 8 inches, drops again to 5 inches and rises a last time to 3 inches before dropping off. My question is when using a tennis ball as the car.. 1.

    asked by Kristy on February 27, 2017
  92. physics

    A horizontal force of magnitude 22 N is applied to a 3.0 kg book as the book slides a distance d = 0.5 m up a frictionless ramp at angle è = 30°. The book begins with zero kinetic energy. What is its speed at the end of the displacement?

    asked by dawn on February 13, 2008
  93. Physics

    a horizontal force of magnitude 18.0 N is applied to a 3.07 kg book as the book slides a distance d = 0.34 m up a frictionless ramp at angle è = 30°. The book begins with zero kinetic energy. What is its speed at the end of the displacement?

    asked by Emily on October 9, 2012
  94. Physics

    a horizontal force of magnitude 20.0 N is applied to a 3.05 kg book as the book slides a distance d = 0.87 m up a frictionless ramp at angle θ = 30°. The book begins with zero kinetic energy. What is its speed at the end of the displacement?

    asked by tom on March 2, 2014
  95. Math

    Andy plans to build a rectangular dog pen in his backyard. A portion of the back wall of his house will serve as one side of the dog pen. If the perimeter of the dog pen must be 40 feet, which of the following widths will result in the maximum area? A. 6

    asked by Audie on September 7, 2014
  96. physics

    A 220-g ball strikes a wall with a speed of 7.0 m/s and rebounds with only 37% of its kinetic energy. What is the speed of the ball immediately after rebounding? What is the magnitude of the impulse of the ball on the wall? If the ball was in contact with

    asked by Katie on February 27, 2012
  97. physics

    a man is running on a circular track of radiur 4 m with a speed of 10ms-1.its angular speed is?

    asked by rida on December 6, 2011
  98. physics

    Calculate the magnitude of the linear momentum for the following cases. (a) a proton with mass 1.67 10-27 kg, moving with a speed of 4.00 106 m/s (b) a 16.5 g bullet moving with a speed of 270 m/s (c) a 70.5 kg sprinter running with a speed of 12.5 m/s (d)

    asked by Elisa on July 7, 2008
  99. science

    A nail is driven into a board with an initial kinetic energy of 150 j. If the potential energy before and after the event is the same, what is the change in the internal energy of the board and nail?

    asked by nireen on February 8, 2015
  100. Physics

    The potential energy of a golf ball in a hole is negative with respect to the ground. Under what circumstances (if any) is the ball's kinetic energy negative? It's rest energy?

    asked by Aly on December 31, 2009

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