. The figure shows the free-body diagram for the block. represents the normal force on the block; and represents the force of kinetic friction.
-What is the magnitude of ?
A)2mg
B)P
C)f
D)mg
E)This cannot be determined from the information given.

Question

. The figure shows the free-body diagram for the block.  represents the normal force on the block; and  represents the force of kinetic friction. 
-What is the magnitude of  ?
A)2mg 
B)P 
C)f 
D)mg 
E)This cannot be determined from the information given.

Quizplus · Accepted Answer

The only force acting downwards on the block is its weight, which has a magnitude of mg. Therefore, 11ea7e4c_68ba_102a_9a0a_713e029a4244_TB3413_11 represents mg, and the answer is D.

the Figure Shows the Free-Body Diagram for the Block