A block with a mass of 10 kg is at rest on a horizontal surface.The coefficient of static friction between the block and the surface is 0.30,and the coefficient of kinetic friction is 0.25.A force of 20 N acts on the block toward the left.The magnitude of the frictional force on the block is
A)10 N
B)20 N
C)0.10 kN
D)30 N
E)3.0 N

Question

Quizplus · Accepted Answer

The frictional force equals the applied force (20 N) since the block remains at rest, indicating static friction is at play, which must balance the applied force to prevent motion.

A Block with a Mass of 10 Kg Is at Rest