The lead female character in the movie Diamonds Are Forever 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 0.012 kg, and its velocity is +715 m/s. Her mass (including the gun) is 48 kg.
(a) What recoil velocity does she acquire in response to a single shot from a stationary position, assuming that no external force keeps her in place?
(b) Under the same assumption, what would be her recoil velocity if, instead, she shoots a blank cartridge that ejects a mass of 5.0 10-4 kg at a velocity of +715 m/s?
I thought this is what i was supposed to do. But it is not giving me the right answer
a) v = (m/M)U = (.012/48)*715 = .178 mps recoil
b) v = (m/M)U = (5E-4/48)*715 = .007 mps recoil ANS
4 answers
you did it correct. I hope you are not putting in mps for m/s
no that is not a problem. I just have to put in the number. the label is provided.
I figured it out. the velocity of the recoil is in the negative direction.
I HAVE NO IDEA:D
1 answer