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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

2 ms-2

b

25 ms-2

c

5 ms-2

d

7 ms-2

answer is C.

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Detailed Solution

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