A mass of 5. 0 Kg is resting on a horizontal, frictionless surface. It is attached to a spring which has a spring constant of of 1200 N/m and a relaxed length of 0. 75 m. The other side of the spring is firmly attached to a wall. On the above mass, just opposite to the point where the spring is attached, a string is attached which runs over a massless, frictionless pulley to a mass of 8. 0 kg hanging below. The gravitational field is 10. 0 N/Kg.
A] If the system is released from rest with the spring in its relaxed state, what is the maximum extension of the spring?
B] What is the maximum kinetic energy of the system.