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The distance between centre of the earth...

The distance between centre of the earth and moon is 384000 km . If the mass of the earth is `6xx10^(24) kg` and `G=6.66xx10^(-11)Nm^(2)//kg^(2)`. The speed of the moon is nearly

A

1 km/s

B

4 km/s

C

8 km/s

D

11.2 km/s

Text Solution

Verified by Experts

The correct Answer is:
A
Orbital velocity of moon
` v _ o = sqrt(( GM _ e) /( r )) = sqrt ( ( 6.6 xx 10 ^( - 11 ) xx 6 xx 10 ^(24 ))/( 384000 xx 10 ^( 3 ) ) `
` = 1 km//s `
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