A car traveling along a straight road slows uniformly from to in

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

Problem

A car traveling along a straight road slows uniformly from 22 m ⁣⋅ ⁣s−122\,\text{m}\!\cdot\!\text{s}^{-1} to 16 m ⁣⋅ ⁣s−116\,\text{m}\!\cdot\!\text{s}^{-1} in 3.0 s3.0\,\text{s}. What is the magnitude of the car’s average acceleration during this time interval? (a) 6.3 m ⁣⋅ ⁣s−26.3\,\text{m}\!\cdot\!\text{s}^{-2} (b) 0.27 m ⁣⋅ ⁣s−20.27\,\text{m}\!\cdot\!\text{s}^{-2} (c) 2.0 m ⁣⋅ ⁣s−22.0\,\text{m}\!\cdot\!\text{s}^{-2} (d) 5.3 m ⁣⋅ ⁣s−25.3\,\text{m}\!\cdot\!\text{s}^{-2}

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