A .015kg bullet is fired straight up at a falling wooden block that has a mass o

Question

A .015kg bullet is fired straight up at a falling wooden block that has a mass of 1.8kg. The bullet has a speed of 810/swhen it strikes the block. The block orignally was dropped from rst from the op of a buiin and ad been fallng for a tim t when the collision with the bullet occure. As a result of the collision, the block (with the bullet in it) reverses direction, rises, and comes to a momentary halt a the to of the building. Find the time t. Also can you include a graph I cant seem to see it.

Explanation / Answer

0.015*810=1.815*v v=6.69 m/s h=6.69^2/(2*9.81) 9.81*t=h 9.81*t=6.69^2/(2*9.81) t=0.23s

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