Pathfinder NDA / NA National Defence Academy and Naval Academy Entrance Examination Physics>Chapter 3 - Centre of Mass and Rotational Motion>Practice Exercise>Q 12

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NDA & NA EE

IMPORTANT

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A wheel of mass $10 kg$ has moment of inertia $160 kg m^{2}$ about its own axis. The radius of gyration will be,

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Important Questions on Centre of Mass and Rotational Motion

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NDA & NA EE

IMPORTANT

Pathfinder NDA / NA National Defence Academy and Naval Academy Entrance Examination Physics>Chapter 3 - Centre of Mass and Rotational Motion>Practice Exercise>Q 17

Consider a two particles system with particles having masses

m_{1}

and

m_{2}

. If the first particle is pushed towards the centre of mass through a distance

d

, by what distance should the second particle be moved so as to keep the centre of mass at the same position?

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Pathfinder NDA / NA National Defence Academy and Naval Academy Entrance Examination Physics>Chapter 3 - Centre of Mass and Rotational Motion>Practice Exercise>Q 18

A particle of mass

2 kg

is moving such that at a time

t

, its position in metre is given by,

r (t) = 5 \hat{i} - 2 t^{2} \hat{j}

. The angular momentum of the particle at

t = 2 s

about the origin in

kg m^{- 2} s^{- 1}

is,