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Q.

A car moves along a horizontal circular road of radius r with velocity v .The coefficient of friction between the wheels and the road is . Which of the following statement is not true?

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a

The car will slip if

b

The car will slip if

c

The car will slip if

d

the car will slip at lower speed, if it moves with some tangential acceleration, than if it moves at constant speed.

answer is C.

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Detailed Solution

Centripetal force is supplied by the frictional force of where f = mV2 / r.Now , fmax = µ . mg.: The car will slip if f > fmaxi,e if mV2 / r > µ mgi.e if r < V2/µg
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A car moves along a horizontal circular road of radius r with velocity v .The coefficient of friction between the wheels and the road is . Which of the following statement is not true?