Moment of inertia (AQA A-Level Physics): Quizzes

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Moment of inertia
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What is the formula for torque TT when force FF acts at perpendicular distance ss from the axis?

T=FsT = Fs

What is the unit of moment of inertia?

kg m²

What is the rotational form of Newton's second law for a particle at distance rr from axis?

T=mr2αT = mr^2\alpha

What is the moment of inertia for a single particle of mass mm at distance rr from the axis?

I=mr2I = mr^2

What is the moment of inertia of a hoop (thin ring) of mass mm and radius rr about its central axis?

I=mr2I = mr^2

What is the moment of inertia of a solid disc about its central axis?

I=12mr2I = \frac{1}{2}mr^2

Which has a larger moment of inertia for the same mass and radius?

Hollow cylinder

If the radius of a hoop is doubled while mass stays constant, how does moment of inertia change?

Quadruples

For two discs on a common axis, how do you find total moment of inertia?

Add individual moments

A hoop has mass 0.4 kg and radius 0.5 m. What is its moment of inertia?

0.1 kg m²

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