A 0.0245 kg bullet is accelerated from rest to a speed of 555 m/s in a 2.85 kg rifle. The pain of the rifle's kick is mu

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A 0 0245 Kg Bullet Is Accelerated From Rest To A Speed Of 555 M S In A 2 85 Kg Rifle The Pain Of The Rifle S Kick Is Mu 1 (42.66 KiB) Viewed 38 times

A 0.0245 kg bullet is accelerated from rest to a speed of 555 m/s in a 2.85 kg 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 J) 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 (d) How much kinetic energy (in J) 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 momentu a hard-thrown 0.410 kg football that has a speed of 25.0 m/s. Pplayer Pball Discuss its relationship to this problem.