A box is raised at constant speed by a man pulling up on a rope. During the asce

Question

A box is raised at constant speed by a man pulling up on a rope. During the ascent, which of the following are true (select more than one if applicable): The work performed by all conservative forces on the box is 0. The work performed by all non-conservative forces on the box is 0. The net work performed on the box is 0 The work performed by all conservative forces on the box is positive. The work performed by all non-conservative forces on the box is positive. As a result of your answer to the previous question, use the work-energy theorem to determine which of the following is true. The change in the total energy of the box is 0. The change in the total energy of the box is positive. The change in the total energy of the box is negative As a result of your answer to the previous question, use the work-energy theorem to determine which of the following is true. The change in the total energy of the box is 0. The change in the total energy of the box is positive. The change in the total energy of the box is negative.

Explanation / Answer

1ST Part:

- The net work performed on the box is 0.

- The work performed by all non-conservative forces on the box is positive.

2ND Part:

- The change in the total energy of the box is positive.

3RD Part:

- The work performed by all non-conservative forces on the box is 0.

- The work performed by all conservative forces on the box is positive.

4TH Part:

- The change in the total energy of the box is 0.

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