Gamma Question Bank for Medical Physics>Chapter 8 - Gravitation>Assignment>Q 11

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The kinetic energies of a planet in an elliptical orbit about the sun at positions $A, B$ and $C$ are $K_{A}, K_{B}$ and $K_{C}$ respectively. If $A C$ is the major axis and $S B$ is perpendicular to $A C$ at the position of the sun $S$ as shown in the figure, then

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Important Questions on Gravitation

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Gamma Question Bank for Medical Physics>Chapter 8 - Gravitation>Assignment>Q 12

A planet is revolving around the sun in an elliptical orbit. Select the correct option.

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Gamma Question Bank for Medical Physics>Chapter 8 - Gravitation>Assignment>Q 13

A body is projected vertically upward with speed

v_{0} (v_{0} < v_{escape})

from surface of earth. The speed of body at

h

height is (where

R

is radius of earth and

g

is acceleration due to gravity at earth's surface)

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Gamma Question Bank for Medical Physics>Chapter 8 - Gravitation>Assignment>Q 14

A satellite of mass

m

is in a circular orbit of radius

4 R_{E} .

How much energy is required to transfer it to a circular orbit of radius

7 R_{E} ?

(R_{E}

is radius of earth,

M

is mass of earth).

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Gamma Question Bank for Medical Physics>Chapter 8 - Gravitation>Assignment>Q 15

A satellite of mass

m_{0}

is orbiting around the earth at a height

h

above the surface of the earth. If the mass of the earth is

M

and its radius is

R,

then angular momentum of the satellite is

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Gamma Question Bank for Medical Physics>Chapter 8 - Gravitation>Assignment>Q 1

The ratio of kinetic energy of a planet at perigee and apogee during its motion around the sun in elliptical orbit of eccentricity

e

is

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Gamma Question Bank for Medical Physics>Chapter 8 - Gravitation>Assignment>Q 2

An earth satellite

X

is revolving around earth in an orbit whose radius is one-fourth the radius of orbit of a communication satellite. Time period of revolution of

X

is

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Gamma Question Bank for Medical Physics>Chapter 8 - Gravitation>Assignment>Q 3

Two satellites of equal mass are revolving around earth in elliptical orbits of different semi-major axis. If their angular momenta about earth centre are in the ratio

3 : 4

then ratio of their areal velocity is

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Gamma Question Bank for Medical Physics>Chapter 8 - Gravitation>Assignment>Q 4

When a satellite moves around the earth in a certain orbit, the quantity which remains constant is :