A man holding a gun ((mass of man)+(mass of gun)+(mass of bullet)=60kg)) skates on frictionless ice at an initial speed of +2 m/s and fires a 100 gram bullet with a speed of +500 m/s from the gun.
a) What is the speed of the man after firing the gun? (be sure to include +/- direction)
b) What is the initial total energy of the man-gun-bullet system (before the bullet is fired)? What is the final total energy of the man-gun-bullet system (just after the bullet is fired)?
c)is this an example of an elastic, inelastic, or perfectly inelastic collision, and why? I don't understand this concept very well.
M1V1i + M2V2i = M1V1f + M2V2f
Total KE (before)= .5MV^2
Total KE (after)= .5M1V1^2 + .5M2V2^2
The Attempt at a Solution
I think this is correct, but I'm not completely sure.
I'm not sure if its elastic or inelastic, I have trouble understanding that stuff.
energy before is