Physics education research, electronic materials, and the musings of Christopher Moore, Ph.D.
Physics education research, electronic materials, and the musings of Christopher Moore, Ph.D.
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hey guys here is my problem,am not sure how to solve it. A 15g bullet is fired horizontal ly into a 3kg block which is suspended on a string,the bullet sticks into the block and causes it to move 10cm above its initial position. What is the velocity of the bullet?
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looks like we have some momentum problem over here?
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Here the kinetic energy of the bullet gets converted to potential energy of the block. so gain in p.e of the block is = loss of k.e of the bullet
p.e of the bullet is=mass x height x 'g'=3 x 0.1m x 9.8
equate this to k.e of bullet= 1/2 x mass x velocity square.
Mass of bullet is given and hence find 'v'. 
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