MCQ
As per given figure to complete the circular loop what should be the radius if initial height is $5 m$
- A$4 m$
- B$3 m$
- C$2.5 m$
- ✓$2 m$
✓
Answer
Correct option: D.
$2 m$
(d) In the given condition friction provides the required centripetal force and that is constant. i.e. $m \omega r$ =constant$\Rightarrow r \propto \frac{1}{\omega^2} \therefore r_2=r_1\left(\frac{\omega_1}{\omega_2}\right)^2=9\left(\frac{1}{3}\right)^2=1 cm$
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