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Is it true that friction force always works in the opposite direction of applied force?

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True

False

answer is A.

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Detailed Solution

The above statement is true.
The frictional force always works in the opposite direction of the applied force. For example, when we walk, our foot pushes the ground in the backward direction, and friction acts in the forward direction, which helps humans to move forward.
newtonian mechanics - Are the friction and the reaction force from the ground while walking the same? - Physics Stack Exchange

newtonian mechanics - Are the friction and the reaction force from the ground while walking the same? - Physics Stack Exchange

Friction force:
It is a contact force because it is produced due to the rubbing of two different surfaces. Types of friction are –
• Rolling friction
• Sliding friction,
• Static friction.
Rolling friction is produced due to the rolling of the object on a surface while sliding friction is produced by rubbing two surfaces. Another type of friction is static friction, produced due to an object's resistance because of its state.

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