A heavy iron block is placed on the ground, a person tries to push the block with the force of 200 N and the block does not move. This meansa)Friction force = Applied forceb)Friction force andgt; Applied forcec)Friction force andge; Applied forced)None of the aboveCorrect answer is option 'C'. Can you explain this answer?

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A heavy iron block is placed on the ground, a person tries to push the block with the force of 200 N and the block does not move. This means

a)
Friction force = Applied force
b)
Friction force > Applied force
c)
Friction force ≥ Applied force
d)
None of the above

Correct answer is option 'C'. Can you explain this answer?

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A heavy iron block is placed on the ground, a person tries to push the...

Friction Force:
It is a kind of resisting force that acts between two contact bodies to avoid relative motion between them.

It is formed due to the close interaction of charged particles at the surface of the bodies due to electromagnetic forces.
Mathematically it is represented as Friction force = μ N.
Where N = normal force = m × g
Normal force: It is a force that is exerted by the surface perpendicular to the body. It is a component of the contact force.

Frictional forces are of two kinds:

Static friction (f_s): When two bodies do not slip on each other, the force of friction is static friction. It can change its value until its max. F_max≥ f_s
Kinetic Friction (f_k): When two bodies slip over each other the force of friction is called kinetic friction.

Coefficient of Kinetic friction (μ_k) < Coefficient Static friction (μ_s).

Here, Applied force = friction force
Applied force (F) = μ N = μ m g

Explanation:

Since the block does not move so frictional force (f_s) ≥ Applied force
This means frictional force (f_s) ≥ 200 N

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A heavy iron block is placed on the ground, a person tries to push the...

> Applied force > Friction force

The correct answer is b) Friction force > Applied force.

If the block does not move despite the person's effort to push it with a force of 200 N, it indicates that the friction force acting on the block is greater than the applied force. Friction is a force that opposes motion and prevents objects from sliding against each other. In this case, the friction force is strong enough to counteract the applied force and keep the block stationary.

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A heavy iron block is placed on the ground, a person tries to push the block with the force of 200 N and the block does not move. This meansa)Friction force = Applied forceb)Friction force > Applied forcec)Friction force ≥ Applied forced)None of the aboveCorrect answer is option 'C'. Can you explain this answer?

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