An 87-g box is attached to a spring with a force constant of 82 N/m. The spring is compressed 11 cm from the equilibrium position and the system is released.
(a) What is the speed of the box when the spring is stretched by 7.0 cm passing the equilibrium?
(b) What is the maximum speed of the box? (A, 10 marks)
The Attempt at a Solution
1/2[(82N/m)(0.007m - (-0.011m))^2