Posted by Jon on Thursday, April 3, 2008 at 9:33am.
A marksman at rest fires a 4.00-kg gun that expels a bullet of mass 0.0140 kg with a velocity of 181 m/s. The marksman's mass is 81.0 kg. What is the marksman's velocity after firing the gun?
mc = 85kg
md = 0.0140
= .0298 m/s
physics repost - bobpursley, Thursday, April 3, 2008 at 9:43am
Wouldn't it be
v then would be something different than your calcs.
physics repost - Jon, Thursday, April 3, 2008 at 9:44am
I guess its not suppose to be there. I got it somehow though. I don't know what to do now
physics repost - bobpursley, Thursday, April 3, 2008 at 9:46am
solve for v.
v= massbullet/massmarksman * velocty bullet.
bobpursley please read - Jon, Thursday, April 3, 2008 at 10:27am
my answer for this one was correct its not 0.0312
physics repost - drwls, Thursday, April 3, 2008 at 12:47pm
Yes, your answer was correct. You were right to add the mass of gun and marksman, since they move together. This assumes the ground he is standing on exerts no horizontal force, which is not strictly true after the shot is fired
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