A hockey puck sliding on a frictionless surface strikes a box at rest. After the

Question

A hockey puck sliding on a frictionless surface strikes a box at rest. After the collision, the two objects stick together and move at some final speed. Which of the following describes the change in momentum and energy of the puck during the collision? The puck loses some, but not all, of its original momentum and mechanical energy. One cannot determine if the momentum or energy of the puck is conserved without knowing the final velocities and masses two objects. The puck conserves its original momentum, but loses some, but not all, of its mechanical energy. The puck loses some momentum in the collision, but conserves its mechanical energy. The puck conserves its original momentum and mechanical energy. The puck conserves its original momentum, but loses all of is mechanical energy. Which of the following describe the change in momentum and energy of the combined puck and box during the collision? One cannot determine if momentum or energy of the system is conserved without knowing final velocities masses of the two objects. The system conserves its original momentum, but loses all of its mechanical energy. The system conserves its original momentum and mechanical energy. The system locos some, but not all, of its momentum and mechanical energy. The system loses some momentum in the collision, but conserves its mechanical energy. The system conserves its original momentum, but loses some, but not all, of its mechanical energy.

Explanation / Answer

1) in inelastic collision , momentum is conserved, but kinetic energy is changed

Third option is correct

i.e the puck conserves its original momentum , but loses some but not all of its mechanical energy

2) Last otpion is correct

the system conserves its original momentum but loses some but not all of its mechanical energy

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