spring laying HORIZONTALLY on a flat surface is compressed 4.5 cm (convert to m), and a ball is placed on the end of it.

. A vertical spring with spring constant 250 N/m and whose mass is negligible is loaded with a 0.050 kg ball and it is compressed by 15 cm when "cocked and loaded", then (a) what speed will it give the ball as it just leaves contact with the spring at the spring's equilibrium position and (b) to what height above the original compressed location will the ball reach when it is launched straight up into the air? Include a diagram of the situation.

Ggg

A 0.1 kg disk is shot across a frictionless horizontal surface by compressing it against a spring and releasing it. The spring has a spring constant of 380 N/m and is compressed from its equilibrium position by 6.2cm when the disk to a complete stop. As the disk gets released from the spring, what will be the speed (in m/s) of the disk when the spring is compressed by 3.8cm?