Question

A 20kg block is sliding down a 30° ramp at a constant velocity. Calculate the normal force acting on the block. Calculate the coefficient of kinetic friction between the block and the ramp.

Answer 1

Let me try:

Normal force= 169.74N

Coefficient of kinetic friction= 0.577

Step-by-step explanation

a. For a given inclined plane, normal friction is equal to the force perpendicular to the plane which is equal to

mgcos theta = 20×9.8× cos30 = 169.74N

b. The coefficient of kinetic friction for an inclined plane is given as

tan theta =tan 30 = 0.577