A 20g bullet strikes a hanging wooden block of 5kg with velocity of 100meter per second through which the block is raised?
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A block of wood of mass 5 kg is suspended by a thread. A gun is fired in the horizontal direction and the bullet strikes the block and is embedded in it. As a result, the block is raised to 15 cm. If the mass of the bullet be 20 g, find the initial velocity of the bullet. (g=9.8ms
−2
)
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conservation of energy
2
1
mv
2
=mgh
V
2
=2gh
V = 1.715 m / s
Applying
conservation of momentum
μ = ( m + M ) V
solving
U=
0.02
8.607
= 430 m / s
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