In the diagram, a force of 20 newtons is applied to a block. The block is in dynamic equilibrium. What is the magnitude and dire
ction of the frictional force A. 20 newtons in the direction of the applied force
B .20 newtons opposite to the direction of the applied force
C. 20 newtons perpendicular to the direction of the applied force
D. 20 newtons in two directions, perpendicular and in the direction of the applied force
E. No friction is acting on the block.
Dynamic equilibrium is a state in which the net external force and torque on a system moving with constant velocity is zero. A force of 20 N is applied to a block. The magnitude and direction of the frictional force is: B ) 20 Newtons opposite the direction of the applied force.
The answer would be B because since the block is in equilibrium, the opposing force would have to be equal to the first force to be able to give you the dynamic equilibrium.