What is direction of friction force? at any instant , when body is moving

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Student friendly Evangelist

Direction opposite to the motion of the body aligned to the surface of contact
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Teacher cum Researcher

Very concept of friction itself is to oppose motion. Hence, frictional force is always directed in the direction opposite to that to motion. When motion I mean, relative motion.
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Btech 2nd year student in MAIT

Always in the opposite direction to the direction of moving body and along the point of contact.
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Maths | Physics | Chemistry | IIT Delhi Graduate

It always acts opposite to velocity vector.
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Physicist with specialization in Astronomy and Mathematics.

Dear Gulshan, the purpose of friction is to stop the motion of body, so in order to achieve that it acts opposite to the direction of motion of body at any instant. Also it appears only when body is moving or about to (when force is applied).
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Maths and physics teacher till engineering level

Opposite to direction of motion
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Physics and aptitude teacher

Direction of frictional force will always be in opposite to the direction of motion of moving body
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Physics and aptitude teacher

The direction of frictional force will be always opposite to the direction of motion of moving body.
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Math matician

Friction force will act apposite to the motion of the body..
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Physics becomes quite easy when the curiosity and interest is invoked.

It's always opposite the direction of the motion or tendency of motion.
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