Question

A chain 25 feet long whose weight is 61 pounds is hanging over the edge of a tall building and does not touch the ground. How much work is required to lift the entire chain to the top of the building? Your answer must include the correct units. (You may enter lbf or lb*ft for ft-lb.)

Answer 1

The work done is 1525 lbf.

Step-by-step explanation:

Given that,

Length = 25 feet

Weight = 61 pounds

We need to calculate the work done

Using formula of work done

Work done = gravitational potential energy

`W=mgh`

Where, W = work done

m = mass

g = acceleration due to gravity

h = height

Put the value into the formula

`W=61*25`

`W=1525\ lbf`

Hence, The work done is 1525 lbf.