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A spring tied to a vertical surface with constant K = 240N / m is compressed...

A spring tied to a vertical surface with constant K = 240N / m is compressed a distance of 0.123m (with respect to its natural length). A 5g mass is placed on the other side of the spring and the spring is released.

a) indicate which statement is true or false.

1. The initial kinetic energy is different from zero.

2. The initial non-zero elastic potential energy.

3. The final kinetic energy is different from zero.

4. The final elastic potential energy is zero.

b) Calculate the speed with which the mass comes out.
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