MEDIUM
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IMPORTANT
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A body which is initially at rest at a height above the surface of the earth of radius , falls freely towards the earth, then its velocity on reaching the surface of the earth is
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Important Questions on Gravitation
HARD
JEE Main
IMPORTANT
What is the energy required to launch a satellite from the earth's surface in a circular orbit at an altitude of ( radius of the earth)
EASY
JEE Main
IMPORTANT
A body of super condense material with a mass twice the mass of earth but size very small compared to the size of the earth starts from rest from above the earth surface. It reaches earth in time
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JEE Main
IMPORTANT
A solid sphere of uniform density and radius applies a gravitational force of attraction equal to on a particle placed at a distance from the centre of the sphere. A spherical cavity of radius is now made in the sphere as shown in the figure. The sphere with the cavity now applies a gravitational force on the same particle. The ratio is
EASY
JEE Main
IMPORTANT
The escape velocity from the earth is . A body is projected with velocity . With what constant velocity will it move in the interplanetary space?
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JEE Main
IMPORTANT
Suppose, the gravitational attraction varies inversely as the distance from the earth. The orbital velocity of a satellite in such a case varies as power of distance, where is equal to
MEDIUM
JEE Main
IMPORTANT
Let be the energy required to raise a satellite to height above the earth's surface and be the energy required to put the same satellite into orbit at that height. Then, is equal to
EASY
JEE Main
IMPORTANT
A satellite is revolving around the earth with orbital speed . If it stops suddenly, the speed with which it will strike the surface of the earth would be ( escape velocity of a particle on earth's surface.)
EASY
JEE Main
IMPORTANT
Two particles of equal mass go round a circle of radius under the action of their mutual gravitational attraction. The speed of each particle is
