Question

why spring balance is different from force, friction and drag
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Answer 1

Answer:

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Answer 2

Explanation:

Friction is the force generated between the surfaces of two objects in contact with each other, which opposes any applied force that would accelerate one object relative to the other. It acts opposite to the direction of this applied force, and depends linearly on the force that acts to keep the two surfaces together (which is perpendicular to the applied force). This is usually written as F = μN, where μ is the coefficient of friction (vide infra), and N is the normal force, that is, the force perpendicular to the contact surface.

If we attach a spring scale to one of the blocks shown above, and try to pull it across the table, we find that it takes a certain force to accelerate the block from rest. If we maintain that force, the block begins to accelerate, but for some smaller force, the block moves at constant speed. Hence, there are two manifestations of friction: static friction, which acts as long as the object is still at rest, and kinetic friction, which acts as long as the object is moving.