Question

Moe is carrying and supporting a large crate by exerting 1000 n. he is walking at constant velocity across a level, horizontal floor. if he covers a distance of 10 meters, how much work does he do on the crate

Answer 1

The work done by a constant force is equal to 
$W=Fd$
where
F is the magnitude of the force
d is the displacement through which the force is applied

In our problem, the force applied by Moe is F=1000 N, and the distance covered by applying this force is d=10 m. Therefore, the work done by Moe is
$W=Fd = (1000 N)(10 m)=10000 J = 1 \cdot 10^4 J$