IS MECHANICAL ENERGY CONSERVED IN THESE PROBLEMS?
A 10.0 kg block at rest on a horizontal, frictionless surface is subjected to a force of 1.00 X 102 N at an angle of 40.0o above the horizontal as shown. This force is applied as the block slides through a distance of 4.00 m.

A 5.00 kgblock is held at rest on a slope is released. It slides down the slope to a level surface, losing 9.00 m in height in doing so. Then, for 3.00 m a friction force of 10.0 N acts on the block. After that the block continues sliding along the horizontal surface until it encounters an unstretched spring. cont. be

Question

IS MECHANICAL ENERGY CONSERVED IN THESE PROBLEMS?
 A 10.0 kg block at rest on a horizontal, frictionless surface is subjected to a force of 1.00 X 102 N at an angle of 40.0o above the horizontal as shown. This force is applied as the block slides through a distance of 4.00 m.

A 5.00 kgblock is held at rest on a slope is released. It slides down the slope to a level surface, losing 9.00 m in height in doing so. Then, for 3.00 m a friction force of 10.0 N acts on the block. After that the block continues sliding along the horizontal surface until it encounters an unstretched spring. cont. be

anonymous · Answer

. If the spring constant is 40.0 N/m what will the compression of the spring be when the block stops moving (for an instant). Consider the slope and the horizontal surface to be frictionless except for the friction patch.

shamim · Answer

Mechanical energy is always conserved

anonymous · Answer

thanks!