A 0.015-kg bullet is fi red straight up at a falling
Chapter , Problem 24(choose chapter or problem)
A 0.015-kg bullet is fi red straight up at a falling wooden block that has a mass of 1.8 kg. The bullet has a speed of 810 m/s when it strikes the block. The block originally was dropped from rest from the top of a building and has been falling for a time t when the collision with the bullet occurs. As a result of the collision, the block (with the bullet in it) reverses direction, rises, and comes to a momentary halt at the top of the building. Find the time t.
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