A 0.0270 kg bullet is accelerated from rest to a speed of 565 m/s in a 3.20 ky rifle. The pain of the rifle's kick is much worse if you hold the gun loosely a few centimeters from your shoulder rather than holding it tightly against your shoulder. (Assume the bullet moves in the +x-direction.) (a) Calculate the recoil velocity (in m/s) of the rifle if it is held loosely away from the shoulder. (Indicate the direction with the sign of your answer.) m/s (b) How much kinetic energy (in ]) does the rifle gain? (c) What is the recoil velocity (in m/s) if the rifle is held tightly against the shoulder, making the effective mass 28.0 kg? (Indicate the direction with the sign of your answer.) m/s ) How much kinetic energy (in ]) is transferred to the rifle-shoulder combination? The pain is related to the amount of kinetic energy, which is significantly less in this latter situation. (e) Calculate the momentum of a 110 kg football player running at 8.00 m/s. Compare the player's momentum with the momentum of a hard-thrown 0.410 kg football that has a speed of 25.0 m/s. Pplayer - Pball Discuss its relationship to this