Laws Of Motion Question 388

Question: 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 : $ ( g=10m/s^{2} ) $

Options:

A) 20 N

B) 50 N

C) 100 N

D) 2 N

Show Answer

Answer:

Correct Answer: D

Solution:

Force, $ F=\mu R=Mg $
weight of block $ \mu R=0.2\times 10=2N $



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