Question

How much energy is stored in a spring with a spring constant of 760 N.m if the spring is compressed a distance of 0.57 m from its free length?

A. 430 j
B. 250 j
C. 220 j
D. 1.6 * 10^5 j
E. 120 j

Answer 1

Energy = 1/2 kx^2
Energy = 1/2 760 0.57^2
Energy = 123 J
Answer E <<<<<=====

Note: you should express k as units of N/m