Question

A wheel rotates with constant acceleration of $2.0$ radian / $\sec ^{2}$. If the wheel starts from rest the number of revolution it makes in the first ten second, will be approximately:

• A. 32
• B. 24
• C. 16
• D. 8

Answer 1

Answer: (C)

16

Answer 2

$\theta=\frac{\alpha t^{2}}{2}=\frac{2 \times 100}{2}=100$
$n=\frac{\theta}{2 \pi}=\frac{100}{2 \times 3.14}$
$=15.92 \approx 16$