You don\'t have to show your work i just need to compare the answers you get wit

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You don't have to show your work i just need to compare the answers you get with the answers that i got to see if i'm right.

10. A student initially at rest on a frictionless frozen pond throws a 1 kg hammer in one direction After the throw, the hammer moves off in one direction while the student moves off in the other direction. Which of the following correctly describes the above situation? A. The hammer will have the momentum with the greater magnitude B. The student will have the momentum with the greater magnitude C. The hammer will have the greater kinetic energy D. The student will have the greater kinetic energy E. The student and the hammer will have equal but opposite amounts of kinetic energy 11. A tennis ball of mass m rebounds from a racquet with the same speed v as it had initially as shown. The magnitude of the momentum change of the ball is A. B. mv C. 2mv D. 2mvsine 2mvcose 12. The direction of the impulse vector on the ball in the previous question is directed A. Leftward along the normal to the surface of the racket. B. Rightward along the normal to the surface of the racket C. Downward and tangent to the surface of the racket. D. Upward and tangent to the surface of the racket 13. Which of the following is true when an object of mass m moving on a horizontal frictionless surface hits and sticks to an object of mass M m, which s initially at rest on the surface? A. The collision is elastic B. All of the initial kinetic energy of the less massive object is lost. C. The momentum of the objects that are stuck together has a smaller magnitude than the initial momentum of the less-massive object D. The speed of the objects that are stuck together will be less than the initial speed of the less massive object. E. The direction of motion of the objects that are stuck together depends on whether the hit is a head-on collision 14. An object of mass M travels along a horizontal air track at a constant speed v and collides elastically with an object of identical mass that is initially at rest on the track. Which of the following statements is true for the two objects after the impact? A. The total momentum is Mv and the total kinetic energy is Mv2 B. The total momentum is Mv and the total kinetic energy is less than 12 Mv C. The total momentum is less than Mv and the total kinetic energy is 12 Mv D. The momentum of each object is Va Mv E. The kinetic energy of each object is Mv 15. The two blocks of masses M and 2M initially travel at the same speed v but in opposite directions. They collide and stick together. How much mechanical energy is converted to other forms of energy during the collision? A. Zero B. 1/2Mv2 C. 3/4Mv2 D. 4/3Mv2 E. 3/2 Mv

Explanation / Answer

10) c-> The hammer will have greater kinetic energy.

11 ) c->change of magnitude in momentum=2mv

12) D-> Upward and tangent to the surface of racket

13)C-> the momentum of the object that are stuck togetherhas a smaller magnitudethan the initial momentum of less massive object.

According to conservation of energy.

14)a-> total momentum is MV and total kinetic energy is 1/2 mv2

15)D->. 4/3 mv2

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