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 $
