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

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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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Important Questions on Centre of Mass and Rotational Motion

MEDIUM

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 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,