A car slows down from to

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

Problem

A 1000 kg1000\,\text{kg} car slows down from 25 m/s25\,\text{m/s} to 15 m/s15\,\text{m/s}. Determine the net work done by the braking force. (a) +2.0×105 J+2.0 \times 10^{5}\,\text{J} (b) −4.0×105 J-4.0 \times 10^{5}\,\text{J} (c) −2.0×105 J-2.0 \times 10^{5}\,\text{J} (d) +1.125×105 J+1.125 \times 10^{5}\,\text{J}

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