Question

A rubber band has a spring constant of 12 N/m, if the rubber band is stretched 0.25 m. What is the elastic potential energy stored in the rubber band?


7.65 J

, Not Selected

0.375 J

, Not Selected

9.8 J

, Not Selected
Incorrect answer:

0.120 J

Answer 1

Elastic potential energy: U = 1/2 k x^2.

Here k = 12 N/m, x = 0.25 m:
U = 0.5 × 12 × (0.25)^2 = 0.5 × 12 × 0.0625 = 0.375 J.

So the correct answer is 0.375 J.