Gravitation Question 260
Question: The distance between centre of the earth and moon is 384000 km. If the mass of the earth is $ [6\times 10^{24}kg] $ and $ [G=6.66\times {{10}^{-11}}Nm^{2}/kg^{2}] $ . The speed of the moon is nearly[MH CET 2002]
Options:
A) 1 km/sec
B) 4 km/sec
C) 8 km/sec
D) 11.2 km/sec
Show Answer
Answer:
Correct Answer: A
Solution:
$ [v=\sqrt{\frac{GM}{r}}=\sqrt{\frac{6.67\times {{10}^{-11}}\times 6\times 10^{24}}{384000\times 10^{3}}}=1,km/s] $
