MEDAL GIVEN TO CORRECT ANSWER.
A man pushes with a force of 300 N on a bookcase of mass 75 kg. The coefficient of static friction between the bookcase and the floor is 0.9. Because of friction, the bookcase does not move. What is the force of friction on the bookcase?

A. 551 N
B. 662 N
C. 362 N
D. 300 N

Question

MEDAL GIVEN TO CORRECT ANSWER. 
A man pushes with a force of 300 N on a bookcase of mass 75 kg. The coefficient of static friction between the bookcase and the floor is 0.9. Because of friction, the bookcase does not move. What is the force of friction on the bookcase?

 		A.	551 N
 		B.	662 N
 		C.	362 N
 		D.	300 N

jziggy · Answer

If the bookcase isn't moving then that means the forces balance out.

anonymous · Answer

D=300N

anonymous · Answer

Recall that the force of friction is the coefficient of friction times the weight.

anonymous · Answer

you dont need to do any calculation

anonymous · Answer

@douglaswinslowcooper that is the maximum force, if you just multiply thar you will get 662, then the bookcase will be moving alone.

anonymous · Answer

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