A bullet of mass 0.11 kg and moving along the horizontal direction with a speed 1129.8 meters/sec hits a wooden block of mass 12.7 kg and gets embedded in it. Find the impulse acting on the block in meters/sec.(adsbygoogle = window.adsbygoogle || []).push({});

Here's what I did:

initial momentum = (0.11*1129.8) + (12.7*0) = 124.278

final momentum = (0.11 + 12.7) v

inelastic collision, momentum is conserved; so:

initial momentum = final momentum

124.278 = 12.81v

v = 9.702 m/s

final momentum = (12.81*9.702) = 124.278

Impulse = final momentum - initial momentum

= (124.278-124.278)

= 0

The answer is 123.21 meter/sec. What did I do wrong? Please help. Thanks!

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# Homework Help: Help: Impulse

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