Question

4. A person applies 20.0 N of upward force on a crate that continues to fall down 1.00 meters. How much work

is done on the crate?
20.0 J of negative work is done.
b. 0 J of work is done.
c. 20.0 J of positive work is done.
5. A person applies 20.0 N of rightward horizontal force on a crate that moves 1.00 meters to the right. How
much work is done on the crate?
30.0

Answer 1

W = F * X

W = 20.0 N * -1 m = -20 N-m (work done by person)

Work is the product of force X distance

The person does -20 N-m of work and the crate loses 20 N-m of potential energy