Question

A wooden box is first pulled across a horizontal steel plate as shown in the diagram A. The box is then pulled
across the same steel plate while the plate is inclined as shown in diagram B. How does the force required to
overcome friction in the inclined case (B) compare to the horizontal case (A)?
(A) the frictional force is the same in both cases
(B) the inclined case has a greater frictional force
(C) the inclined case has less frictional force
(D) the frictional force increases with angle until the angle is 90º, then drops to zero

Answer 1

Answer:

option C is correct as On inclined plane normal reaction is less