A block rests on a horizontal, frictionless table. It is attached to a spring an

Question

A block rests on a horizontal, frictionless table. It is attached to a spring and set into motion. The picture above shows snapshots of the block at 5 different labelled locations during the motion. The two extreme locations (Points E and B) represent the two extremes of the motion of the block. Point D represents the equilibrium position. Evaluate each statement below.

Positive Zero Negative The kinetic energy of the block at location B is ____.
Positive Zero Negative  The kinetic energy of the block at location C is ____.
Positive Zero Negative  The potential energy of the spring at location D is ____.
Positive Zero Negative  The potential energy of the spring at location C is ____.
Positive Zero Negative  The kinetic energy of the block at location D is ____.

Explanation / Answer

The kinetic energy of the block at location B is ____.Zero
  The kinetic energy of the block at location C is ____. Positive
  The potential energy of the spring at location D is   Zero
  The potential energy of the spring at location C is ____. positive
The kinetic energy of the block at location D is ____. positive

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