physics number 54

[taralplp]

A 5.5 kg bullet is fired into a block of wood with a mass of 22.6g. The wood block is initially at rest on a 1.5m tall post. After the collision, the wood block and bullet land 2.5m from the base of the post.Find the initial speed of the bullet.

[chroot]

If I may ask, where did this problem come from? It has already been asked several times here on physicsforums.

http://www.physicsforums.com/showthread.php?s=&threadid=13728
http://www.physicsforums.com/showthread.php?s=&threadid=14141

- Warren