Physics
Friction :
- promotes motion
- opposes motion
- acts in the direction of motion
- is always a nuisance.
Force
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Answer
opposes motion
Reason — Friction is the force that opposes the relative motion between the two surfaces in contact with each other.
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Related Questions
A force does not change :
- mass
- length
- shape
- state of motion
A force to be expressed correctly requires :
- only the magnitude
- only the direction
- both the magnitude and direction
- none of the above.
Friction is reduced by :
- making the surfaces wet
- making the surfaces dry
- making the surfaces rough
- sprinkling sand on the surface.
Friction :
- causes wear and tear
- produces heat
- stops a moving body
- has all the above disadvantages