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Physics 9 Chapter 5 - Gravitation - 6
1.
What is ‘r’ in the formula: F = [G (m x M
e
)] / r
2
?
a) Mass of the object
b) Distance of the body from the centre of the Earth+Mass of the Earth
c) Radius of earth
2.
Gravitational force is a ...................force?
a) Non-contact
b) None of these
c) Variable
d) Contact
3.
What is the force of earth called that is acting on the body whether the body is in contact with the Earth or not?
a) Field force
b) Field strength
c) Gravitational force
d) Gravitational field
4.
Where the gravitational field exists?
a) Towards north
b) Everywhere
c) Nowhere
d) Towards south
5.
Find the value of g due to the Earth at geostationary satellite. The radius of the geostationary orbit is 48700 km?
a) 0.017 ms
-2
b) 1.7 ms
-2
c) 17.0 ms
-2
d) 0.17 ms
-2
6.
Where the gravitational field does not exist?
a) Everywhere
b) Towards south
c) Towards north
d) Nowhere
7.
What is the direction of gravitational field around the Earth?
a) Away from the centre of earth
b) Towards the centre of earth
c) Tangent to the south side of earth
d) Tangent to the north side of earth
8.
In the gravitational field of the Earth, what is the gravitational force per unit mass called?
a) Gravitational field strength
b) Field force
c) Gravitational field force
d) None of these
9.
The value of which of the following at any point is equal to the value of ‘g’ at that point?
a) Gravitational constant
b) Value of ‘G’
c) Field force
d) Gravitational field strength
10.
The value of which of the following at any point is equal to the value of gravitational field strength at that point?
a) Value of ‘m’
b) Value of ‘G’
c) Value of ‘M
e
’
d) Value of ‘g’
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