Identify the scalar quantity in the given options:

work

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impulse

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force

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acceleration

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Solution

The correct option is D work
Impulse, force and acceleration are vector quantities since they specify the direction while work done is a scalar quantity. There is no direction in which the work is done.
Work done $W = \to F \cdot \to s$ .
Work is a scalar product of force vector $\to F$ and displacement $\to s$ and hence work is a scalar quantity.

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