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physics-9-chapter-4-turning-effect-of-force-6
1.
What is ‘r’ in the formula: F = [G (m x M
e
)] / r
2
?
a) Distance of the body from the centre of the Earth+Mass of the Earth
b) Mass of the object
c) Radius of earth
2.
Gravitational force is a ...................force?
a) Non-contact
b) Contact
c) Variable
d) None of these
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) Gravitational force
c) Gravitational field
d) Field strength
4.
Where the gravitational field exists?
a) Everywhere
b) Nowhere
c) Towards south
d) Towards north
5.
Find the value of g due to the Earth at geostationary satellite. The radius of the geostationary orbit is 48700 km?
a) 0.17 ms
-2
b) 1.7 ms
-2
c) 17.0 ms
-2
d) 0.017 ms
-2
6.
Where the gravitational field does not exist?
a) Nowhere
b) Everywhere
c) Towards south
d) Towards north
7.
What is the direction of gravitational field around the Earth?
a) Towards the centre of earth
b) Away from the centre of earth
c) Tangent to the north side of earth
d) Tangent to the south 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) Gravitational field force
c) 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 field strength
b) Field force
c) Gravitational constant
d) Value of ‘G’
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 ‘g’
b) Value of ‘m’
c) Value of ‘G’
d) Value of ‘M
e
’
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