Using a rope of negligible mass, you pull a box along a horizontal surface with a constant horizontal force . The box moves at a constant velocity from position to position . The force of friction cannot be neglected. Which one of the following statements concerning the motion of the box from to is true?

Question

Using a rope of negligible mass, you pull a box along a horizontal surface with a constant horizontal force   ​. The box moves at a constant velocity from position    to position   . The force of friction    cannot be neglected. Which one of the following statements concerning the motion of the box from    to    is true?

Answer

The total work done on the box by the net force is non-zero.

Answer

The work done on the box by the gravitational force is non-zero.

Answer

The magnitude of the work done on the box by    is equal to the magnitude of the work done by   .

Answer

The work done on the box by    is positive.

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