1. Two students push a dune buggy 35.0 m across a lot. The force required is 825 N. How much work is done?

2. After a rain, the force necessary to push the dune buggy in Problem through the mud is doubled. How does the amount of work done by the students change?

3. A delivery person carries a 215-N box up stairs 4.20 m vertically and 6.80 m horizontally.

(a) How much work does the delivery person do?

(b) How much work does the delivery person do in carrying the box down the stairs?

4. A crate is pulled by a force of 628 N across the floor by a worker using a rope making an angle of 46.0° with the floor. If the crate is pulled 15.0 m, how much work does the force on the rope do?

5. A laborer pushes a wheelbarrow weighing 200 N at 25.0° above the horizontal. If he pushes it a distance of 25.0 m, how much work is done?

6. An end loader lifts a 1000-N bucket of gravel 1.75 m above the ground. How much work is done?