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Question Number 22112 by tawa tawa last updated on 11/Oct/17

$$\mathrm{A}\mathrm{boy}\mathrm{ran}\mathrm{around}\mathrm{a}\mathrm{circular}\mathrm{part}\mathrm{of}\mathrm{radius}14\mathrm{m}\mathrm{in}15\mathrm{s}.\mathrm{Calculate}\mathrm{the}$$$$\mathrm{average}\mathrm{velocity}\mathrm{and}\mathrm{the}\mathrm{average}\mathrm{speed}.$$

Answered by $@ty@m last updated on 11/Oct/17

$$AverageVerlocity=\frac{Displacement}{time}$$$$=\frac{0}{15}=0$$$$AverageSpeed=\frac{Distance}{time}$$$$=\frac{2\pi .14}{15}$$$$=\frac{2\times 22\times 2}{15}$$$$=\frac{88}{15}$$$$=5.87m/s$$

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