A car is traveling on a straight

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

Problem

A 1000 kg1000\,\text{kg} car is traveling on a straight, level road at 15 m/s15\,\text{m/s} when its driver steps on the accelerator. The car’s acceleration immediately becomes 2.0 m/s22.0\,\text{m/s}^2 in the forward direction. Ignoring friction and air resistance, what is the instantaneous net power associated with the horizontal net force acting on the car at that instant? (a) 1.5×104 W1.5 \times 10^{4}\,\text{W} (b) 3.0×104 W3.0 \times 10^{4}\,\text{W} (c) 3.2×104 W3.2 \times 10^{4}\,\text{W} (d) 2.0×105 W2.0 \times 10^{5}\,\text{W}

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