A 40-g object connected to a spring with a force constant of 30 N/m oscillates with an amplitude of 8 cm on a frictionless, horizontal surface.
(a) Find the total energy of the system.
(b) Find the speed of the object when its position is 1.25 cm. (Let 0 cm be the position of equilibrium.)
(c) Find the kinetic energy when its position is 2.5 cm.
(d) Find the potential energy when its position is 2.5 cm.