A crate is lifted vertically 1.5 m and then held at rest. The crate has weight 100 N (i. e., it is supported by an upward force of 100 N). How much work is being done to hold the crate 1.5 m above the ground in this way? 1. 150 J 2. More than 150 J 3. None of these 4. A bit less than 150 J 5. No work is being done.

Question

Tinky

Physics

26 August, 15:57

A crate is lifted vertically 1.5 m and then held at rest. The crate has weight 100 N (i. e., it is supported by an upward force of 100 N). How much work is being done to hold the crate 1.5 m above the ground in this way? 1. 150 J 2. More than 150 J 3. None of these 4. A bit less than 150 J 5. No work is being done.

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Gavyn Sharp · Answer 1

5 ... No work is being done.

Explanation:

Hello!

Remember that the concept of work is defined as the force required to move a certain body distance, it is calculated as the product of force by distance.

therefore, the work required to raise the box is 150J.

However, the work required to keep the box lifted without moving is zero since although the box has a force due to the weight it does not move.