A body is rotating in a horizontal circle of radius 2.5m with an angular speed…

A body is rotating in a horizontal circle of radius 2.5m with an angular speed of 5 rad s-1. Calculate the magnitude of the radial acceleration of the body
  • A.
    62.50ms-2
  • B.
    31.25ms-2
  • C.
    12.50ms-2
  • D.
    10.00ms-2
Correct Answer: Option C
Explanation

(alpha = frac{W_2 – W_1}{t} = frac{5}{1} = 5 rad)/s2
9 = (alpha)r
= 5 x 2.5 = 12.50ms2

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