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A mass is supported by a spring so that it is at rest 0.5 m above a tabletop. The mass is pulled down 0.4 m and released at time t = 0, creating a periodic up and down motion that can be modelled using a trigonometric function. It takes 1.2 seconds to return to the lowest position each time.

Write an equation for the function in part a). [4]

What assumption(s) must be made for this function to be valid? Explain.

3. The attempt at a solution

i have no idea

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# Homework Help: Plllease help

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