NEET 2020 Revision:Gravitation - 02 (26.02.2020)

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Question 1

Two point mass each having mass m are placed at distance d apart. The particles start moving due to mutual gravitational attraction. Velocity of the particles as the separation reduces to d/2 is

• A
• B
• C
• DNone of these

Question 2

Initially both sphere & particle were at rest. They will collide with speed

• A
• B
• C
• D

Question 3

The escape velocity from the earth is about 11. The escape velocity from a planet having twice the radius and the same mean density as the earth is

• A22
• B11
• C5.5
• D15.5

Question 4

A uniform ring of mass m and radius r is placed directly above a uniform sphere of mass M and of equal radius. The centre of ring is at a distance 2r form the centre of sphere as shown is figure. The gravitational force exerted by the sphere on the ring will be

• A
• B
• C
• D

Question 5

Gravitational potential due to a mass distribution is given by V = (x²y + y²z). The gravitational field can be expressed as

• A
• B
• C
• D

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