posted by HELP ME!!!!!!
A 3.70 kg bird is flying past a tree that has a 4.70 kg chipmunk in it. The chipmunk decides to jump on the bird so he can fly too. As the bird is flying past the tree, the chipmunk leaps off at 8.00 m/s in the same direction the bird is flying and lands on the bird. Immediately after the collision, the bird and chipmunk together have a speed of 15.6 m/s. What was the initial speed of the bird?
3.70 v + 4.70 (8) = (3.7+4.7)(15.6)