Question

andy pulls a boat a distance of 14.8 meters along a dock using a rope that makes an angle of 25.0o with the horizontal. If she uses a force of 910 N, calculate work?

Answer 1

The horizontal componet of the force is:

$$F_h = 910N\cdot \cos 25\degree \approx 824.7N$$

By definition, the work done by Andy is:

$$W = F_hs$$

where $s = 14.8m$ is the distance. Thus, obtain:

$$W = 824.7N\cdot 14.8m \approx 12206\space J$$

Answer. 12206 J.