A mass of 0.4 kg, is connected to a spring with a spring constant of 100 N/m, slides on a frictionless horizontal surface in simple harmonic motion. Its maximum displacement is 0.3 m?
a. What is the maximum speed of the mass?
b. What is the energy stored in the mass/spring system when its speed is half the maximum value?
c. What is the acceleration of the mass when its speed is half the maximum value?