Awoman on a bridge 90.0 m high sees a raft floating at
aconstant speed on the river below. she drops a stone fromrest in
an attempt to hit the raft. the stone is releasedwehn the raft has
6.00 m more to travel before passing under thebridge. the stone
hits the water 2.00 m in front of theraft. find the speed of the
raft.

While strolling downtown on a saturday afternoon, you stumble across an old car show. as you are walking along an alley toward a main street, you glimpse a particularly stylish alpha romeo pass by. tall buildings on either side of the alley obscure your view, so you see the car only as it passes between the buildings. thinking back to your physics class, you realize that you can calculate the car's acceleration. you estimate the width of the alleyway between the two buildings to be 6 m. the car was in view for 0.6 s. you also heard the engine rev when the car started from a red light, so you know the alpha romeo started from rest 4 s before you first saw it. find the magnitude of its acceleration.