A spring on a horizontal surface can be stretched and held 0

A spring on a horizontal surface c.an be stretched and held 0.8 m from its equilibrium position with a force of 64 N. How much work is done in stretching the spring 3.5 m from its equilibrium position? How much work is done in compressing the spring 1.5 m from its equilibrium position? The amount of work done is J. (Simplify your answer.)

Solution

k = 80 0.5kx^2 = W a) 490 J b) 90J