A) 493 cm/s2
B) 720 cm/s2
C) 860 cm/s2
D) 990 cm/s2
Correct Answer: A
Solution :
\[a=4{{\pi }^{2}}{{n}^{2}}r=4{{\pi }^{2}}{{\left( \frac{1}{2} \right)}^{2}}\times 50=493\,cm/{{s}^{2}}\]
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