1. A massless spring (k = 300 N/m) is pulled by 30 cm from its natural length and then released. The spring is attached to a 0.40 kg block and oscillates across a horizontal frictionless surface. Calculate the (a) Maximum Velocity (b) Maximum Acceleration (c) Velocity, Restoring Force and Acceleration at 20cm from its natural length. 2. A spring stretches 0.40 m when a 2.0 kg mass is hung from it. The spring is stretch an additional 0.20m from this point an released. Determine the a) spring constant (b)amplitude c)Maximum acceleration d)maximum velocity e)kinetic, potential and mechanical energy when the mass is 0.10 from its equilibrium position. 3. Alison is at the park swinging on the swings. She has a mass of 37 kg and a speed of 7.5 m/s as she passes through the equilibrium position. What is her maximum kinetic energy and to what height does she swing? 4. A pendulum with a mass of 10 kg passes through its equilibrium position with a kinetic energy of 265J. What is it velocity at the equilibrium position? 5. A pendulum in a grandfather has a mass of 1.75 kg. If the change in height of the pendulum is 4.5 cm, what is the maximum kinetic energy of the pendulum