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qUESTIONS

Radius of earth is around 6000 km. The weight of body at height of 6000 km from earth surface becomes

The distance between centre of the earth and moon is 384000 km. If the mass of the earth is 6 × 10^24 kg and G = 6.66 × 10^-11 Nm²/kg^2.The speed of the moon is nearly

Geostationary satellite

Imagine a light plant revolving around a very massive star in circular orbit of radius r with a period of revolution T. If the gravitational force of attraction between the planet and the star is proportional to r-5/2. Then the correct relation is

The mean radius of the earth is R, its angular speed on its own axis is ω and the acceleration due to gravity at earth’s surface is g. The cube of the radius of the orbit of a geostationary satellite will be

The periodic time of a communication satellite is

An astronaut orbiting the earth in a circular orbit 120 km above the surface of earth, gently drops a spoon out of space-ship. The spoon will

Periodic time of a satellite revolving above Earth’s surface at a height equal to radius of Earth is [g is acceleration due to gravity at Earth’s surface]

The time period T of the moon of planet Mars (mass Mm) is related to its orbital radius R(G = Gravitational constant) as

A planet moving along an elliptical orbit is closest to the sun at a distance r1, and farthest away at a distance of r₂. If v₁ and v₂ are the linear velocities at these points respectively. Then the ratio is V1/V2

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