Universal law of gravitation, free fall, weight, thrust and pressure, buoyancy.
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Q1 · Gravitation · EASY
The value of acceleration due to gravity on the surface of Earth is approximately:
Q2 · Gravitation · HARD
The escape velocity from Earth's surface is approximately 11.2 km/s. What would be the escape velocity from a planet having twice the mass and same radius as Earth?
Q3 · Gravitation · MEDIUM
The weight of a body on the surface of Earth is 60 N. What will be its weight at a height equal to half the radius of Earth?