Question
Question: A horizontal force of 10 N is necessary to just hold a block stationary against a wall. The coeffici...
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 (fig.). The weight of the block is–
A
2N
B
20 N
C
50 N
D
100 N
Answer
20 N
Explanation
Solution
N = 10 N
f = mN =Mg = 20 N