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Physics

Mechanics

Easy

Question

$T h r e e space p a r t i c l e s space o f space m a s s e s space 8 K g comma space 4 K g space a n d space 4 K g space a r e space a t space left parenthesis 4 comma 1 right parenthesis comma left parenthesis negative 2 comma 2 right parenthesis space a n d space left parenthesis 1 comma negative 3 right parenthesis space r e s p e c t i v e l y. space I f space t h e y space a r e space a c t e d space u p o n space b y space f o r c e s space space 16 j with hat on top comma negative 6 i with hat on top space a n d space 14 i with hat on top space space n e w t o n s space r e s p e c t i v e l y comma space a c c e l e r a t i o n space o f space t h e space c e n t r e space o f m a s s space o f space t h e space s y s t e m space i s$

$(2 \hat{i} - 8 \hat{j}) m s^{- 2}$
$(8 \hat{i} - 2 \hat{j}) m s^{- 2}$
$(2 \hat{i} + 8 \hat{j}) m s^{- 2}$
$\frac{1}{2} \hat{i} + \hat{j}$

The correct answer is: $1 half i with hat on top plus j with hat on top$

$1 half i with hat on top plus j with hat on top$

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