# Forces on a spring

Hi,

Ok so heres my problem...

A force F causes a spring with spring constant of 150N/m to compress by 2 cm. Determine the force exerted by and the potential energy of the spring (obv. p=mgh) before and after compression.

Determine the frequency period of the oscillation of a 100g mass oscillating on the spring.

So basically I cant find any similar questions in my textbook and none of my answers seems plausible. You guys are my last resort!!!! :L:D

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