Question

What work is done when a person lifts a 1.6 kg package and places it on a shelf 2.4m high?

Answer 1

Step-by-step explanation:

Work is the dot product of force and distance

`W = F*d=Fd*\cos(theta)`

The only force acting on this box is the force of gravity (weight) which is mass*gravity

F = (1.6)(9.8) = 15.68N

The angle is the angle between the force and distance. In this case it is zero, therefore cos(Ф) = 1

`W=15.68*2.4=37.6J`