An object A of the mass of 0.1 kg exerts a force of $1$ N on a body B. Then the acceleration of the body A is ____ ${m s}^{- 2}$

zero

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10

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- 10

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- 5

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Solution

The correct option is C $- 10$
$m_{A} = 0.1 k g$
According to Newton's 3rd law
Two forces are equal and opposite.
$F_{B} + F_{A} = 0$
$F_{B} = 1^i$
$F_{A} = - 1^i$
$m_{A} a_{A} = F_{A}$
$a_{A} = \frac{- 1}{0.1} m / s^{2}$
$= - 10 m / s^{2}$

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