Simple Harmonic Motion - Multiple Choice Questions

Q1. 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 0.50 s. Which line, A to D, is correct for these oscillations?

 
Amplitude /cm
Period /s
A
10
1.0
B
10
2.0
C
20
2.0
D
20
1.0

It is pulled down 10 cm therefore the maximum displacement from the equilibrium (amplitude) is 10 cm. To travel from the displacement to the equilibrium position is a quarter of the whole cycle (A to midpoint to-A to midpoint to A (again)). Therefore period is 2.0 s