Friction on Inclines

1. Explain in your own words how the force of gravity acting on an object on an inclined plane is resolved into components. Why is this necessary for analyzing the motion of the object?

2. Draw a free body diagram for a box being pushed *up* an inclined plane at a constant speed. Include the force applied to the box, the force of gravity, the normal force, and the force of kinetic friction.

3. A block is sliding down an inclined plane at a constant acceleration. If the angle of the incline is increased, how will this affect the acceleration of the block (assuming the coefficient of kinetic friction remains constant)? Explain your reasoning.