A 0.50-kg block is placed against a horizontal spring with a…
A 0.50-kg block is placed against a horizontal spring with a spring constant of 400 N/m on a frictionless surface. The spring is compressed 0.20 m and then released. (a) What is the elastic potential energy stored in the spring? (b) What is the speed of the block when it leaves the spring? SHOW WORK.