1. One of the events in a strength competition is to pull a cement block 100 feet. One competitor pulls the block by exerting a constant force of 250 pounds on a rope attached to the block at an angle of 30° with the horizontal (see figure). Determine the work done in pulling the block.

2. A child pulls a toy wagon by exerting a constant force of 25pounds on a handle that makes a 20° angle with the horizontal (see figure). Determine the work done in pulling the wagon 50 feet.

3. A ski patroller pulls a rescue toboggan across a flat snow surface by exerting a constant force of 35pounds on a handle that makes a 22° angle with the horizontal (see figure). Determine the work done in pulling the toboggan 200feet.

Transcribed Image Text:

30° -100 ft- Not drawn to scale 20