A) 27 cm
B) 9 cm
C) 3 cm
D) 1 cm
Correct Answer: D
Solution :
In the given condition friction provides the required centripetal force and that is constant. i.e. mw2r=constant Þ \[r\propto \frac{1}{{{\omega }^{2}}}\]\ \[{{r}_{2}}={{r}_{1}}{{\left( \frac{{{\omega }_{1}}}{{{\omega }_{2}}} \right)}^{2}}=9{{\left( \frac{1}{3} \right)}^{2}}=1\,cm\]
You need to login to perform this action.
You will be redirected in
3 sec
