In the figure shown, a block of weight 10 N resting on a ho…

Physics Friction Static and Limiting Friction Single Correct MCQ

Published on: September 13, 2026

In the figure shown, a block of weight 10 N resting on a horizontal surface. The coefficient of static friction between the block and the surface µ s = 0.4 . A force of 3.5 N will keep the block in uniform motion, once it has been set in motion. A horizontal force of 3 N is applied to the block, then the block will

Move over the surface with constant velocity

Move having accelerated motion over the surface

Not move

First it will move with a constant velocity for some time and then will have accelerated motion

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The correct answer is:

$\mathbf{F}_1 = \mu_s R = 0.4 \times mg = 0.4 \times 10 = 4 \mathrm{N}$ i.e. minimum 4 N force is required to start the motion of a body. But applied force is only 3 N. So, the block will not move.

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