Question 582: Centre of Mass and Rotational Motion

Question

Figure shows triangular lamina which can rotate about different axes moment of inertia is maximum, about the axis

Accepted Answer

The moment of inertia is given by
$$I=\sum m_i r_i^2$$
If the distance of particles from the axis of rotation is larger, then the moment of inertia will be larger. For axis QR, the particles will be situated at greater distances and hence the moment of inertia will be greater.

Answer

PR

Answer

QS

Answer

QR

Answer

PQ

Centre of Mass and Rotational Motion

Figure shows triangular lamina which can rotate about different axes moment of inertia is maximum, about the axis

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