| A horizontal force of 10 N is necessary to just hold a block stationary against a wall. The coefficient or friction between the block and the wall is 0.2. The weight of the block is : \[\left( g=10\text{ }m/{{s}^{2}} \right)\] |
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A) 20 N
B) 50 N
C) 100 N
D) 2 N
Correct Answer: D
Solution :
Force, \[F=\mu R=Mg\] weight of block \[\mu R=0.2\times 10=2N\]
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