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JEE 2020 Revision: Gravitation

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Question 1

If the distance between sun and earth is made 3 times of the present value then gravitational force between them will become-

Question 2

A spherical shell is cut into two pieces along a chord as shown in figure. If I denote the gravitational field strength, then for points P and Q -

Question 3

Suppose gravitational force varies

inversely as n^th power of distance. The square of time period of a planet in a circular orbit of radius R around the sun will be proportional to–

Question 4

If R is the radius of the earth and g the acceleration due to gravity on the earth's surface, the mean density of the earth is-

Question 5

If the earth suddenly stops rotating, the value of g at any place will -

Question 6

The weight of an object in the coal mine, sea level, at the top of the mountain are W₁, W₂ and W₃ respectively, then-

Question 7

The escape velocity from a planet is V. If its mass and radius becomes four and two times respectively, then the escape velocity will become -

Question 8

A person brings a mass of 1kg from infinity to a point A. Initially the mass was at rest but it moves at a speed of 2m/s as it reaches A. The work done by the person on the mass is –3J. The potential at A is-

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Apr 2JEE & BITSAT