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NEET 2007
Exam
NEET
Year
2007
Subject
Physics
Chapter
Motion in Two Dimensions

NEET 2007 · Physics · Motion in Two Dimensions

A wheel has angular acceleration of 3.0 rad / sec^2 and an initial...

A wheel has angular acceleration of 3.0 rad/sec2\mathrm{rad} / \mathrm{sec}^2 and an initial angular speed of 2 rad/sec2~ \mathrm{rad}/ \mathrm{sec}. In a time of 2sec2 \mathrm{sec} it has rotated through an angle (in radian) of:

Options

  1. A10
  2. B12
  3. C4
  4. D6

Correct answer

A. 10

Step-by-step solution

Here θ=ωt+12t2\theta=\omega t+\frac{1}{2} t^2=(2)(2)+12(3)(2)2=4+6=10rad\begin{aligned} & =(2)(2)+\frac{1}{2}(3)(2)^2 \\ & =4+6=10 \mathrm{rad} \end{aligned}$$
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