Kepler's laws, gravitational potential, escape velocity, orbital motion, satellites.
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Q1 · Gravitation (Class 11) · HARD
The escape velocity from Earth's surface is approximately 11.2 km/s. What would be the escape velocity from a planet of mass 4 times and radius 2 times that of Earth?
Q2 · Gravitation (Class 11) · EASY
The acceleration due to gravity on the surface of Earth is approximately:
Q3 · Gravitation (Class 11) · MEDIUM
At what height above Earth's surface does the acceleration due to gravity become g/4? (R is Earth's radius)