A block with a mass of m2 kg rests on a frictionless...

A block with a mass of M=2 kg rests on a frictionless horizontal surface and it is attatched to a massless and frictionless spring with a spring constant k=18 N/m. At t=0 s, the block is released at rest from position deltax=2 m from its equilibrium position, deltax=0. You may use pi=3. a) how much potential energy is stored in the spring at t=0?

1. A spring with a spring constant of 310 N/m is placed on a horizontal smooth surface and a mass of 4.5 kg is pushed against it. As a result the spring is compressed by 0.60 m. The mass is then released. A) What is the force of the spring on the block before the block is released? B) What is the potential energy U, kinetic energy K, and the total mechanical energy E, of the block spring system before the block is released? C) What is the potential energy, kinetic energy and the total mechanical energy of the block/spring system when the block is no longer in contact with the spring? D) What is the velocity of the mass when it loses contact with the spring? E) The spring is now placed vertically with the mass on top of the spring and the spring compresses. Draw the free body diagram for the mass when it is stationary in this arrangement. How much is the spring compressed?

Timothy J.

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