Energy: Elastic Potential Energy

Question 1

What is elastic potential energy?

Answer 1

The energy stored in a stretched spring is known as elastic potential energy.

Question 2

What is the formula for elastic potential energy?

Answer 2

E_e = ½ x k x e²

(Elastic potential energy (Joules) = ½ x spring constant (N/m) x extension squared (m))

Question 3

A spring has an extension of 20cm. Calculate the elastic potential energy stored in the spring (k = 100 N/m).

Answer 3

E_e = ½ x 100 x 0.2²

E_e = 2J