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A bullet of mass 7.00 g is fired horizontally into a wooden block of mass 1.20...

A bullet of mass 7.00 g is fired horizontally into a wooden block of mass 1.20 kg resting on a horizontal surface. The coefficient of kinetic friction between block and surface is 0.250. The bullet remains embedded in the block, which is observed to slide a distance 0.300 m along the surface before stopping.

a) What was the initial speed of the bullet?

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Answer #1

Concept - use work energy theorem to find the speed of the block plus bullet system immediately after collision. Then use momentum conservation principle to find the initial speed of the bullet

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