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CIRCULAR MOTION

Rotating stone

The force directed forwards the centre is called the centripetal force.

This force is required for a stone rotated in a circle by a string

The in the string provides the centripetal force

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Centripetal Force

Centripetal force must be provided to keep circular motion for any object

Question 1

Static friction opposes the impending motion of cart moving away from the circular path

Hint

No relative motion between the tyre and surface in radial direction

Banking of Road

banking

Consider a car of mass m making circular motion of radius R on a banked road and f is the friction.

Identify Force 1 and Force 2

Force 1 is and Force 2 is

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Circular motion without friction

Question

Maximum possible speed of a car on a banked road is greater than that on a flat road

Select the correct one where the car moves even without friction on a banked road

Hint

μs = 0 in the equation

bank

Answers

s

r

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