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25.1) Consider two identical cars travelling around a circular track. One car travels on an inside track and one on an outsid

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Answer #1

25.1) angular velocity of both the cars are equal as both takes same time to complete the circle.( 2 = م T )

But liners velocity of outer car is greater because it moves in a circle of greater radius. (v= \omega r)

As kinetic energy is given by

K = (1/2)mu?

Therefore kinetic energy is greater for the outer car.

25.2)K = (1/2)IW

As moment of inertia (I) is greater for the hoop, therefore, the flywheel(hoop) will have more kinetic energy.

(For hoop, I = mR . For disc , I = mR/2 )

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