How much work must be done on a car travelling at to bring it to rest?

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

Problem

How much work must be done on a 1500 kg1500\,\text{kg} car travelling at 18 m/s18\,\text{m/s} to bring it to rest? (a) +2.4×105 J+2.4 \times 10^{5}\,\text{J} (b) −4.9×105 J-4.9 \times 10^{5}\,\text{J} (c) −2.4×105 J-2.4 \times 10^{5}\,\text{J} (d) −1.2×105 J-1.2 \times 10^{5}\,\text{J}

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