Rotational Motion Question 166
Question: A wheel rotates with a constant acceleration of 2.0 radian/sec2. If the wheel starts from rest, the number of revolutions it makes in the first ten seconds will be approximately
Options:
A) 8
B) 16
C) 24
D) 32
Show Answer
Answer:
Correct Answer: B
Solution:
[b]
$\theta ={{\omega } _{0}}t+\frac{1}{2}\alpha t^{2}\Rightarrow \theta =100rad$
$\therefore $ Number of revolutions
$=\frac{100}{2\pi }=16$(approx.)
