1.
The force of friction always acts in a direction
opposite to the direction of motion of the body.
2.
The magnitude of kinetic friction bears a
constant ratio with the normal reaction between the two surface.The ratio is
called co-efficient of kinetic friction (μn) which is slightly less
than μ.
3.
For maximum speeds , force of friction remains
constant but the decreases with the increasese in speed.
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