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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?



Answer :

The required work to hold the crate above the ground is 150 joule.

We need to know about the work done to solve this problem. The work done by an object depends on the force applied and the distance. The work is proportional to force and displacement. It can be written as

W = F . s

where W is work done, F is the force and s is displacement

From the question above, the given parameters are

F = 100 N

s = 1.5

Thus, the required work to hold the crate above the ground can be calculated

W = F . s

W = 100 . 1.5

W = 150 joule

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