An object of mass m147 kg moving at 47 ms strikes a

Question

Solve the all parts of following problem:

Problem: An object of mass m1=4.7 kg moving at 4.7 m/s strikes a stationary second object of unknown mass. After an elastic collision, the first object is observed moving at 2.35 m/s at an angle of -25° with respect to the original line of motion.

Part A: What is the energy of the second object?

Part B: What is the magnitude of the second object's momentum after the collision?

Part C: At what angle did the second ball move relative to the direction of the first ball's initial motion?

Part D: What is the mass of the second ball?

I need help to determine the magnitude of the second object's momentum after the collision.