SATHEE: Laws Of Motion Question 352

Laws Of Motion Question 352

Question: In the 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 [MP PET 1993]

Options:

A) Move over the surface with constant velocity

B) Move having accelerated motion over the surface

C) Not move

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

Show Answer

Answer:

Correct Answer: C

Solution:

$F_{l} = μ_{s} R = 0.4 \times m g = 0.4 \times 10 = 4 N$ i.e. minimum 4N force is required to start the motion of a body. But applied force is only 3N. So the block will not move.

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Laws Of Motion Question 352

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