A body is moving in a circle with a speed of \( 1 \mathrm{~ms}^{-1} \). This speed increases at ...

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A body is moving in a circle with a speed of \( 1 \mathrm{~ms}^{-1} \). This speed increases at a constant rate of \( 2 \mathrm{~m} \mathrm{~s}^{-1} \) every second. Assume that the radius of the circle described is \( 25 \mathrm{~m} \). The total acceleration of the body after \( 2 \mathrm{~s} \) is
(1) \( 2 \mathrm{~m} \mathrm{~s}^{-2} \)
(2) \( 25 \mathrm{~ms}^{-2} \)
(3) \( \sqrt{5} \mathrm{~ms}^{-2} \)
(4) \( \sqrt{7} \mathrm{~ms}^{-2} \)
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