Friction or not, the work done is
W = F.D (scalar product)
If force is applied in the same direction as the displacement, then work done is simply the product of the magnitude of the force and the distance travelled, namely
W= 21N*3.3m
= 69.3 J
Zak, helping his mother rearrange the furni- ture in their living room, moves a 48.9 kg sofa 3.3 m with a constant force of 21 N.
What is the work done by Zak on the sofa? Neglect friction.
Answer in units of J
1 answer
1 answer