Question

A satellite revolves around the earth in an elliptical orbit. Its speed is
A. same at all points on the orbit.
B. greatest when it farthest from the earth
C. greatest when it is closest to the earth
D. greatest neither when it is closest nor when it is farthest from the earth, but at some other point.

Answer 1

Correct Answer - C

`L=mv_(1)r_(1)=mv_(2)r_(2)`
`(v_(1))/(v_(2))=(r_(2))/(r_(1)), r_(2)gtr_(1),v_(1)gtv_(2)`
`v_(1)=v_(max),v_(2)=v_(min)`