Physics-Friction
NEET Physics Friction MCQ Question
Type: MCQ-numerical-Easy-Class 11
A block of mass 5 kg is resting on a horizontal surface. The coefficient of static friction between the block and the surface is 0.4. What is the maximum horizontal force that can be applied to the block without causing it to move?
A
20 N
B
15 N
C
10 N
D
25 N
Correct Answer
Option A
Detailed Explanation
The maximum static frictional force is given by f_s = μ_s N, where N = mg. Here, N = 5 kg * 9.8 m/s² = 49 N. Thus, f_s = 0.4 * 49 N = 19.6 N, which rounds to 20 N.
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