Help on a problem

[melal]

A 5.5g 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. I just need a little help on where to start. I'm confused because no velocities are given.

[himanshu121]

Thats is what u have to calculate

[himanshu121]

Try the reverse problem assuming the velocities.

Divide the Problem into STEPS.

1)First it is a projectile motion from the given information u can calculate the velocity(Bullet +wood system)

2) now u have the final momentum(combined system) of collision so u can calculate the initial momentum