Need help with showing work for these questions:

4. A 10 kg crate is placed on a horizontal conveyor belt. The materials are such that = 0.50 and k = 0.30. a. Draw a free-body diagram showing all the forces on the crate if the conveyer belt runs at constant speed.

b. Draw a free-body diagram showing all the forces on the crate if the conveyer belt is speeding up.

c. What is the maximum acceleration the belt can have without the crate slipping?

d. If the acceleration of the belt exceeds the value determined in part c, what is the acceleration of the crate?

5. At a history center, an old canal boat is pulled by two draft horses. It doesn't take much force to keep the boat moving; the drag force is quite small. But it takes some work to get the 55,000 kg boat up to speed! The horses can pull with a steady force and put a 1400 N tension in the rope that connects to the boat. The rope is straight and level. The boat starts from rest, and the horses pull steadily as they begin their walk down the towpath. How much distance do the horses cover as they bring the boat up to its final speed of 0.70 mis?

6. At a history center, an old canal boat is pulled by two draft horses. It doesn't take much force to keep the boat moving; the drag force is quite small. But it takes some work to get the 55,000 kg boat up to speed! The horses can pull with a steady force and put a 1400 N tension in the rope that connects to the boat. The rope is straight and level. The boat starts from rest, and the horses pull steadily as they begin their walk down the towpath. How much distance do the horses cover as they bring the boat up to its final speed of 0.70 mis?