A 1.2-kg blob of putty moving at 4.0m/s slams into a 1.2-kg blob of putty at rest. Calculate the speed of the two stuck-together blobs of putty immediately after colliding.

Question

Express your answer to two significant figures and include the appropriate units.

Answer 1

momentum before = momentum after
1.2 * 4 = 2.4 * v