5. A block of mass 20 kg is being pushed down along an incline
by an external force F as shown in the figure. The incline is making an
angle of 30o with the horizontal. Coefficient of kinetic friction
between the block and the incline is 0.35. The block is accelerating downward
along the incline with an acceleration of 1 m/s2.
a. (5 points)
Draw a free body diagram for the block. Clearly show all forces acting
on the block in your diagram.
b. (10 points)
Calculate the normal force acting on the block by the incline, then
calculate the frictional force. What are the directions of these forces?
