A bullet of mass m b is fired horizontally with speed v i at a wooden block of m

Question

A bullet of mass mb is fired horizontally with speed vi at a wooden block of mass mw resting on a frictionless table. The bullet hits the block and becomes completely embedded within it. After the bullet has come to rest within the block, the block, with the bullet in it, is traveling at speed vf.

perfectly elastic
partially inelastic
perfectly inelastic
A bullet of mass mb is fired horizontally with speed vi at a wooden block of mass mw resting on a frictionless table. The bullet hits the block and becomes completely embedded within it. After the bullet has come to rest within the block, the block, with the bullet in it, is traveling at speed vf.

Explanation / Answer

Part A

Perfectly inelastic

Part B

Momentum only

Part C

mbvi =(mb +mw)vf

vf=mb*vi/(mb+mw)

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