1 Find two equations (using cosine and sine) for the following: A mass on the end of a spring is at rest 80 cm above the ground. it is pulled down 60 cm and released at time t ==0. It takes 2 seconds for the mass to return to the low position. 2 2 Find two equations (using cosine and sine) for the following: A mass on the end of a spring is at rest 90 cm above the ground. it is pulled down 30 cm and released at time t = 0.It %3D takes 2.4 seconds for the mass to return to the low position.

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