A horizontal force of 10 N is necessary to just hold a block stationary against a wall. The coefficient of friction between the block and the wall is 0.2. The weight of the block is:
A) 20 N
B) 50 N
C) 100 N
D) 2 N
Correct Answer:
D
Solution :
Force,\[F=\mu R=\mu \,Mg\] Weight of block \[=\mu R=0.2\times 10=2N\] Hence, the correction option is [d].