The lead female character in the movie Diamonds AreForever is standing at the ed

Question

The lead female character in the movie Diamonds AreForever is standing at the edge of an offshore oil rig. As shefires a gun, she is driven back over the edge and into the sea.Suppose the mass of a bullet is 0.0264 kg and its velocity is +731m/s. Her mass (including the gun) is 45.3 kg. (a) What recoilvelocity does she acquire in response to a single shot from astationary position, assuming that no external force keeps her inplace? (b) Under the same assumption, what would be her recoilvelocity if, instead, she shoots a blank cartridge that ejects amass of 0.000645 kg at a velocity of +731 m/s?

(a) Number Units No unitssmm/skgkg·m/sN

Explanation / Answer

m v = M V   by conservation of momentum V = .0264 * 731 / 45.3 = .426 m/s Using blanks V = .000645 * 731 / 45.3 = .01 m.s

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