A body of mass 2 kg is moving in a circular path of radius 20 cm with a speed of 2ms^-1 , then the centripetal acceleration is

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200ms^-2

2ms^-2

20ms^-2

0.2ms^-2

answer is C.

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Detailed Solution

Speed $=2 {ms}^{- 1}$
Radius ${=20×10}^{- 2} m$
Centripetal acceleration
$\begin{array}{l} a_{C} = \frac{v^{2}}{r} \\ a_{C} = \frac{2 \times 2}{20 \times 10^{- 2}} \\ = \frac{4 \times 10}{2} = 20 {ms}^{- 2} \end{array}$

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