JEE Main & Advanced
Physics
NLM, Friction, Circular Motion
Question Bank
Self Evaluation Test - Laws of Motion
question_answer
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 :
[d] For the block to remain stationary with the wall \[f=W\] \[\mu N=W\] \[0.2\times 10=W\Rightarrow W=2N\]