The critical velocity vc = ______?
General Science / Physics Class 9th MCQs — Multiple-choice practice
- A. g/R
- B. √g/R
- C. √gR
- D. gR
Correct answer
√gR
Explanation
Explanation The critical velocity (vc) is the minimum velocity an object must have to orbit the Earth without falling to the ground. It is given by the formula: vc = √(gR) where: g is the acceleration due to gravity (approximately 9.8 m/s²) R is the radius of the Earth (approximately 6,371 kilometers)
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