posted by Leah .
Suppose the block is released from rest with the spring compressed 5.50 cm. The mass of the block is 1.60 kg and the force constant of the spring is 965 N/m . Assume the surface is frictionless.
A) What is the speed of the block when the spring expands to a compression of only 2.50 cm ?
B) What is the speed of the block after it leaves the spring?