Question

A Review Constants Anel elevator held by a single cabe s ascending but slowing down Part A Is the work done tension positive negative or zero? Explain. Match the words in the left column to the appropriate blanks in the sentences on the right. Reset Help positive The tension does work on the elevator because negative zero the elevator's mechanical energy is increasing the tenelon makes the elevator slowing down only gravity does the work on the elevator the tension force acts in the direction of the movement Submit Request Answer u Review Constants An elevator held by a single cable is ascending but slowing down, Submit Request Answer Part B What about the work done by gravity? Explain Match the words in the left column to the appropriate blanks in the sentences on the right.

Answer 1

The work done by tension on the elevator is negative because the tension force and the displacement are in opposite directions. The work done by gravity on the elevator is also negative as gravity acts downward. The total work done on the elevator is negative due to the negative work done by tension and gravity.

Step-by-step explanation:

Part A: The work done by tension on the elevator is negative. When the elevator is ascending but slowing down, the tension force acts in the opposite direction of the displacement. Work is defined as the product of the force applied and the displacement in the direction of the force. Since the tension force and the displacement are in opposite directions, the work done by tension is negative.

Part B: The work done by gravity on the elevator is also negative. Gravity acts downward, which is the opposite direction of the elevator's displacement. Therefore, the work done by gravity is negative.

Part C: The total work done on the elevator is the sum of the work done by tension and the work done by gravity. Since both of these values are negative, the total work done on the elevator is negative as well.