Universal law, escape velocity, Kepler's laws.
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Q1 · Gravitation · EASY
The value of acceleration due to gravity on Earth's surface is approximately:
Q2 · Gravitation · HARD
Two bodies of masses m₁ and m₂ are placed at a distance r apart. If the distance between them is doubled, the gravitational force between them becomes:
Q3 · Gravitation · MEDIUM
At what height above Earth's surface will the value of g be half of its value on the surface? (Take radius of Earth = R)