Physics Momentum Help!

Posted on 2015-01-06 06:22:00 in Physics by ANDREW

A 1.95-kg wooden block rests on a table over a large hole as in the figure below. A 5.50-g bullet with an initial velocity vi is fired upward into the bottom of the block and remains in the block after the collision. The block and bullet rise to a maximum height of 16.0 cm.

Using the conservation of momentum, you can relate the speed of the block and bullet right after the collision to the initial speed of the bullet. Then, you can use the conservation of mechanical energy for the bullet-block-Earth system to relate the speed after the collision to the maximum height.

Calculate the initial velocity of the bullet from the information provided. (Let up be the positive direction.)
Struggling with this one, help please!

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