Question

When a block slides a certain distance down an incline, the work done by

gravity is 300 J. What is the work done by gravity if this block slides the same

distance up the incline?

Answer 1

That is -300 J, because the work = the force times the distance. When the distance is a positive value when it is going down, the distance is a negative value when it is going up. The only thing that change is the minus, the absolute value of the work remains the same