The radius of a planet is twice the radius of earth. Both have almost equal average mass densities. If Vp and Ve are escape velocities of the planet and the earth, respectively, then,
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If vₑ is escape velocity and v(o) is orbital velocity of a satellite for orbit close to the earth’s surface, then these are related by:
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(a) v(o) = √2 vₑ (b) v(o) […]
A geostationary satellite is orbiting the earth at a height of 5R above that surface of the earth, R being the radius of the earth. The time period of another satellite in hours at a […]
A spherical planet has a mass Mp and diameter Dp. A particle of mass m falling freely near the surface of this planet will experience an acceleration due to gravity, equal to
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The height at which the weight of a body becomes 1/16 th, its weight on the surface of earth (radius R), is
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(a) 5 R (b) 15 R (c) 3 R (d) 4 […]
The depth at which the effective value of acceleration due to gravity is g/4 is (R=Radius of earth)
Options
(a) R (b) 3R/4 (c) R/2 (d) R/4
Correct Answer:
3R/4
Explanation:
The effect of […]
Weight of a body of mass m decreases by 1% when it is raised to height h above the earth’s surface. If the body is taken to a depth h in a mine, change in […]
A particle of masses m is thrown upwards from the surface of the earth, with a velocity u. The mass and the radius of the earth are, respectively, M and R. G is gravitational constant […]
A planet moving along an elliptical orbit is closest to the sun at a distance of r₁. If v₁ and v₂ are the linear velocities at these points respectively then the ratio v₁ / v₂ […]
Two spheres of mass m and M are situated in air and the gravitational force between them is F. The space around the masses is now filled with a liquid of specific gravity 3. The […]
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