Rotational kinetic energy (AQA A-Level Physics): Quizzes

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Rotational kinetic energy
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What is the formula for rotational kinetic energy?

Ek=12Iω2E_k = \frac{1}{2}I\omega^2

If angular velocity doubles, by what factor does rotational kinetic energy increase?

Four

In rotational motion, what role does moment of inertia play compared to linear motion?

It replaces mass

What is the primary purpose of a flywheel?

To store rotational kinetic energy

How is linear velocity vv related to angular velocity ω\omega in circular motion?

v=rωv = r\omega

What is the total kinetic energy of a rolling object?

Linear KE + rotational KE

Which has a larger moment of inertia: a disc or hoop of equal mass and radius?

Hoop

For rolling without slipping, what is the velocity at the contact point with the surface?

Zero

How can energy storage in a flywheel be maximized?

Large II and high ω\omega

If angular velocity triples, by what factor does the kinetic energy increase?

Nine

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