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**[SOLVED] Conservation of Momentum problem**

**1. Homework Statement**

A 12.5 g wad of sticky clay is hurled horizontally at a 95 g wooden block initially at rest on a horizontal surface. The clay sticks to the block. After impact, the block slides 7.50 m before coming to rest. If the coefficient of friction between block and surface is 0.650, what was the speed of the clay immediately before impact?

**2. Homework Equations**

Ki = Kf + loss

Pi = Pf

**3. The Attempt at a Solution**

To solve this problem here is what I did:

Ki = Kf + loss

m1vi = (m1 + m2)vf

Using equation 2, I solved for vf. I then plugged that into the vf in the Kf in equation 1. Using this method, however, I did not get a correct answer. I feel like I am missing something at the beginning. Can someone tell me if this is the proper set up or if I am missing something? Thanks.