You must exert a force of 4.5 N on a book to slide it across a table. If you do 2.7J
of work in the process, how far have you moved the book?

0.6m

Explanation:

Given that:

force = 4.5 N

Work done = 2.7J

Distance moved by the book = ?

Since work is done when force is applied on an object over a distance, apply the formula:

work = force x distance

2.7J = 4.5N x distance

Distance = (2.7J / 4.5N)

Distance = 0.6 m

Thus, the book was moved 0.6 metres far

the answer is c. the lower legs are levers, and the knees are fulcrums. the ankles hold the loads.