A vertical spring with spring constant 300 N/m is compressed 0.06 m and a 0.25 kg ball placed on top. The spring is released and the ball flies vertically upward. What is the ball's speed when it has gone 0.1 m high? I don't know which relationship is required to find the speed, Can someone please help? I calculated the maximum hight: mgh = 1/2Dy^2 h = 0.22 m Then i made use of the formula E(final) = E(Initial) 0.25 * g * 0.22 = 0.25 * g * 0.1 + 1/2 * 0.25 * v^2 v = 1.53m/s Is that correct?