A Stationary Mass M = 1

Multiple Choice

A stationary mass m = 1.3 kg is hanging from a spring of spring constant k = 1200 N/m.You raise the mass a distance of 10 cm above its equilibrium position in a time of 1.4 s.What was the average power expended?

A) 0.93 W
B) 4.3 W
C) 5.2 W
D) 8.6 W
E) 10.2 W