A object has velocity described by

PHYSICS · Subjective · A Level · Physics · Mechanics and materials · Mechanics and materials

Problem

A

0.5\,\text{kg}

object has velocity described by

\mathbf v = (3t^{2}\,\hat i + 4t\,\hat j)\,\text{m}\,\text{s}^{-1}

. Determine the magnitude of the instantaneous force acting on the object at

t = 2\,\text{s}

.

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