A) 12
B) 60
C) 112
D) 6
Correct Answer: A
Solution :
According to law of conservation of angular momentum \[m{{\upsilon }_{1}}{{r}_{1}}=m{{\upsilon }_{2}}{{r}_{2}}\] or \[{{\upsilon }_{1}}=\frac{{{\upsilon }_{2}}{{r}_{2}}}{{{r}_{1}}}\] \[=\frac{60\times 1.6\times {{10}^{12}}}{8\times {{10}^{12}}}=12\,m\text{/}s\]You need to login to perform this action.
You will be redirected in
3 sec