Kinetic Energy Exam Questions With Correct Answers

Which formula can be used to find velocity if kinetic energy and mass are known? v = (square root)1/2(KE)(m) v = (square root)2m/KE v = (square root)KE(m) v = (square root)2KE/m {Ans: v = (square root)2KE/m}The work-energy theorem states that the work done on an object is equal to a change in which quantity? kinetic energy displacement potential energy mass {Ans: kinetic energy}The diagram shows a side view of a skateboard ramp. At which labeled points would the skateboarder have the most kinetic energy? W and X X and Y Y and Z W and Z {Ans: X and Y}What is the kinetic energy of a 620.0 kg roller coaster moving with a velocity of 9.00 m/s? 2,790 J 5,580 J 25,100 J 50,200 J {Ans: 25,100 J}Lenny wrote the steps he used to find the mass of an object with 400 J of energy moving at a velocity of 8 m/s. 1. Find the square of 8 m/s, which is 64 m2/s2. 2. Divide kinetic energy, 400 J, by 64 m2/s2, which is 6.25 J per m2/s2. 3. Divide 6.25 J per m2/s2 by 2 to get a mass of 3.125 kg. Which best describes