Suppose that a boat weighs 400 pounds and is on a ramp inclined at 30°. Represent the force due to gravity, F, using F = - 400j as shown in the figure to the right. a. Write a unit vector along the ramp in the upward direction. b. Find the vector projection of F onto the unit vector from part a. c. What is the magnitude of the vector projection in part b? What does this represent?

Suppose that a boat weighs 400 pounds and is on a ramp inclined at 30°. Represent the force due to gravity, F, using F = - 400j as shown in the figure to the right. a. Write a unit vector along the ramp in the upward direction. b. Find the vector projection of F onto the unit vector from part a. c. What is the magnitude of the vector projection in part b? What does this represent?