Gravitation (KVPY Stream-SA (Class 11) Physics): Questions 5 - 8 of 12

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Question number: 5

» Gravitation » Gravitational Potential

MCQ▾

Question

The gravitational potential difference between a point at the surface of a certain planet and a point 20 m above the surface is 8 J kg-1. Assume the gravitational field to be uniform. What is the work done in joule in moving a mass of 4 kg from the surface to a point 5 m above the surface?

Choices

Choice (4) Response
a.

0.16

b.

4.0

c.

1.5

d.

8.0

Question number: 6

» Gravitation » Gravitational Acceleration

Appeared in Year: 2015

MCQ▾

Question

A ball is launched from the top of Mt. Everest which is at elevation of 9000 m. The ball moves in circular orbit around earth. Acceleration due to gravity near the earth’s surface is g. The magnitude of the ball’s acceleration while in orbit is

Choices

Choice (4) Response
a.

Nearly equal to g

b.

zero

c.

much greater than g

d.

close to g2

Question number: 7

» Gravitation » Geo-Stationary Satellites

Appeared in Year: 2015

MCQ▾

Question

If the axis of rotation of the earth were extended into space then it would pass close to

Choices

Choice (4) Response
a.

The sun

b.

The pole star

c.

The moon

d.

The centre of mass of all the planets in the solar system

Question number: 8

» Gravitation » Energy

Appeared in Year: 2015

MCQ▾

Question

A planet is orbiting the sun is an elliptical orbit. Let U denote the potential energy and K denote the kinetic energy of the planet at an arbitrary point on the orbit. Choose the correct statement

Choices

Choice (4) Response
a.

K= U for two positions of the planet in the orbit

b.

K= U always

c.

K< U always

d.

K> U always

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