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If a satellite is orbiting as close to the earth’s surface as possible _____

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in Physics – Class 11 by (74.2k points)
If a satellite is orbiting as close to the earth’s surface as possible _____

(a) its speed is maximum

(b) its speed is minimum

(c) it’s kinetic energy will be minimum

(d) it is not possible to quantify its kinetic energy

This question was posed to me during an interview.

The query is from Gravitation topic in chapter Gravitation of Physics – Class 11

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Right answer is (a) its speed is maximum

The explanation: The orbital velocity is inversely proportional to the square root of the radius of the orbit. This implies that a minimum orbital radius would generate maximum orbital velocity.

Minimum orbital radius is acquired closer to the earth’s surface. Hence, If a satellite is orbiting as close to the earth’s surface as possible its speed is maximum.

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