A body has an acceleration of $- 4 m s^{- 2}$ . What is its retardation ?

- 4 m s^{- 2}

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4 m s^{- 2}

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Zero

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Nothing can be decided

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Solution

The correct option is B $4 m s^{- 2}$
The negative acceleration is called retardation or deceleration. Its unit is same as acceleration.A body has an acceleration of $- 4 m s^{- 2}$ .
its retardation is $4 m s^{- 2}$

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