A) \[mg\]
B) \[m(g+\pi \,n\,{{r}^{2}})\]
C) \[m(g+\pi \,n\,r)\]
D) \[m\{g+({{\pi }^{2}}\,{{n}^{2}}\,r)/900\}\]
Correct Answer: D
Solution :
\[T=mg+m{{\omega }^{2}}r=m\{g+4{{\pi }^{2}}{{n}^{2}}r\}\] \[=m\left\{ g+\left( 4{{\pi }^{2}}{{\left( \frac{n}{60} \right)}^{2}}r \right) \right\}=m\left\{ g+\left( \frac{{{\pi }^{2}}{{n}^{2}}r}{900} \right) \right\}\]
You need to login to perform this action.
You will be redirected in
3 sec
