The lead female character in the movie Diamonds Are Forever (lol so random) is standing at the edge of an offshore oil rig. As she fires a gun, she is driven back over the edge and into the sea. Suppose the mass of a bullet is 0.010 kg and its velocity is +720 m/s. Her mass (including the gun) is 51 kg.(adsbygoogle = window.adsbygoogle || []).push({}); (a) What recoil velocity does she acquire in the response to a single shot from a stationary position, assuming that no external force keeeps her in place? (b) Under the same assumption, what would be her recoil velocity if, instead, she shoots a blank cartridge that ejects mass of 5.0 x 10^-4 kg at a velocity of +720 m/s?

My Conflict- Well, I'm stuck on finding the Force and the wording on which mass to use is confusing (for parts A and B)...The equation I am using is

Force x Time = Change Velocity x Mass -- This problem has something to do with Conservation of Linear Momentum. If you're trying to work this problem out, then the answer you should get for Part B is .0071 m/s. Anyways, PLEASE HELP...I need help ASAP!

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# Homework Help: Tough Gun Recoil Question Literally!: Urgent Q

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