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Q.

A body is moving in a circle with a speed of 1 ms-1. This speed increases at a constant rate of 2 ms-1 every second. Assume that the radius of the circle described is 25 m.The total acceleration of the body after 2 s is

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a

2ms−2

b

25ms−2

c

5ms−2

d

7ms−2

answer is C.

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Detailed Solution

at=2ms−2,v=u+att=1+2×2=5ms−1ac=v2r=5225=1ms−2 Net acceleration =ac2+at2=12+22=5ms−2
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