Chapter 21 of 2363 min read

Rolling motion and rotational kinetic energy

Why this is asked: Racing shapes down an incline without slipping, acceleration depends only on the k²/R² ratio, never on mass or radius — so a solid sphere always beats a solid cylinder, which always beats a ring, at any size.

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Test yourself

•A wheel of a bullock cart is rolling on a level road as shown in the figure below. If its linear speed is $v$ in the direction shown, which one of the following options is correct ( $P$ and $Q$ are any highest and lowest points on the wheel, respectively)?

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