At an instant a ball has instantaneous velocity while moving along a straight line

PHYSICS · Single correct · A Level · Physics · Mechanics and materials · Mechanics and materials

Problem

At an instant a ball has instantaneous velocity v=−15 m s−1v=-15\,\text{m s}^{-1} while moving along a straight line. Its instantaneous speed at that instant is (a) 0 m s−10\,\text{m s}^{-1} (b) 15 m s−115\,\text{m s}^{-1} (c) −15 m s−1-15\,\text{m s}^{-1} (d) 7.5 m s−17.5\,\text{m s}^{-1}

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