Suppose that a man pulls a 408 N sled on a snowy path using a rope?

Question

that makes a 34 degree angle with the ground. The man pulls with a force of 43.2 N. The sled moves 29.7 m in 4.9 s.

What is the man's power? Answer in W.

No more information is given with this problem. Is it impossible to solve with the information provided?

Answer 1

We don't have to know the co-efficient of friction on snow. We can do this without knowing the co-efficient of friction. We don't have to know the weight of the sled, either.

The force on the rope is 43.2 N. The forward component of the force is 43.2 * cos(34).

The work done is 43.2 * cos(34) * 29.7

The power in watts is 43.2 * cos(34) * 29.7 / 4.9