Collision of a block with a spring

[mjolnir80]

Homework Statement

a 100g block on a frictionless table is firmly attached to one end of a spring with k = 20 N/m. the other end of the spring is anchored to the wall. a 20g ball is thrown horizontally toward the block with a speed of 5.0 m/s.
assuming that the collision is perfectly inelastic what is the speed of the ball immediately after the collision and what is the maximum compression of the spring?

Homework Equations

The Attempt at a Solution

so for a perfectly inelastic collision the ball and the block fuse? this one is kind of confusing me. can someone help me out with this
thanks in advance

 

[nasu]

Yes. They move together after collision.

 

[jumpman11372]

Start off by writing a conservation of momentum equation. Have the initial momentum of both objects added together equal to the momentum of both masses stuck together.

m1v1 + m2v2 = (m1+m2)V ; find V and use energy equations to solve for X