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7. A force is applied to a ice skater on a frictionless surface.  The energy gained by the ice skater is equal to the
A. momentum given to the ice skater. Energy is the ability to do work.

When energy is added, the energy added must equal the amount of work done on the object.

The Correct Answer is D.
B. power applied to the ice skater.
C. impulse applied to the ice skater.
D. work done on the ice skater.