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A particle moves in a circle of radius 25 cm at two revolutions per second. The acceleration of the particle in m/s2 is

(a)  π2

(b) 8π2

(c) 4π2

(d)  2π2

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2 Answers

Correct Option  (c) 4π2

Explanation:

Since n = 2 , ω = 2π x 2 = 4π rad/s2

So acceleration = ω2r = (4π)2 x 25/100 m/s2 = 4π2

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Answer is (C) 4π2 

Since, n = 2, ω = 2π x 2 = 4π rad/s2

So acceleration = ω2r = (4π)2 x \(\frac{25}{100}\)m/s2 = 4π2

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