Question

A vertical mass-spring oscillator is displaced 2.0 cm from equilibrium. The 100 g mass passes through the equilibrium point with a speed of 0.75 m/s. What is the spring constant of the spring?
(A) 90 N/m
(B) 100 N/m
(C) 110 N/m
(D) 140 N/m
(E) 160 N/m


I was thinking of using kx = ma but then I realize that it is speed not a... :/ How do I do this problem?

Thank you.

Answer 1

Try to draw a diagram first.