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## Homework Statement

A mass M hangs in equilibrium on a spring. M is made to oscillate about the equilibrium position by pulling it down 10 cm and releasing it. The time for M to travel back to the equilibrium position for the first time is 0.5s. Which line, A to D, is correct for these oscillations?

A) Amplitude(cm) 10 , Period(s) 1.0

B) Amplitude(cm) 10 , Period(s) 2.0

C) Amplitude(cm) 20, Period(s) 2.0

D) Amplitude(cm) 20, Period(s) 1.0

## Homework Equations

I attempted to solve this without the use of equations, but I guess these could be relevant:

T = t/n

T = 1/f

a = -w*2 x

## The Attempt at a Solution

I may have solved the problem without actually knowing it, but its good to make sure. My first guess is when I read "by pulling it down 10 cm and releasing it". I guessed this to be the amplitude since it was released from the extreme position (or atleast I think so), so that leaves me with anwser A or B. Since M was released from the extreme position, It means it would take it 2x0.5 seconds to get back and give us the time period.Therefore, I went for answer A.

Some confirmation would be great. Forgive me if I may have made some mistakes posting this or related - this is my first post on this site :)