Physics

Problem

1.2\times10^{3}\,\text{kg}

car is moving at

10\,\text{m/s}

when a constant forward driving force of

2.4\times10^{3}\,\text{N}

begins to act. Neglect all frictional forces. At what time after the force begins acting is the instantaneous power delivered by the force double its value at the instant the force was applied? a)

2.1\,\text{s}

5.0\,\text{s}

10\,\text{s}

2.5\,\text{s}

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