A wheel rotates with a constant acceleration of 2.0 rad/`s^(2)`. If the wheel starts from rest, the number of revolutions it makes in first ten seconds is

Options

A. 8
B. 16
C. 24
D. 32

Answer

B

Explanation

`theta = omega_(0) t + (1)/(2) alpha t^(2) = 0 + (1)/(2) xx 2 xx 10^(2) = 100` radian
No. of revolutions = `(theta)/(2 pi) = (100)/(2pi) = 16`