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Physics 9 Chapter 5 - Gravitation - 3
1.
According to the law of gravitation, which of the following formula is correct about the gravitational force of attraction F?
a) F = [K (m
1
x m
2
)] / d
2
b) F = [G (m
1
x m
2
)] / d
2
c) F = [k (m
1
x m
2
)] / d
2
d) F = [g (m
1
x m
2
)] / d
2
2.
The gravitational force between two identical lead spheres kept at 1 m apart is 0.006673 N. Find their masses?
a) 10,000 and5,000
b) 5,000 kg each
c) 5,000 and 10,000
d) 10,000 kg each
3.
Which of the following proportionality constant is used in the formula of the gravitational force of attraction F?
a) Proportionality constant: g
b) Proportionality constant: k
c) Proportionality constant: K
d) Proportionality constant: G
4.
What is ‘G’ in the formula: F = [G (m
1
x m
2
)] / d
2
?
a) Acceleration constant
b) roportionality constant
c) Displacement constant
d) Force of gravity constant
5.
What is‘d’ in the formula: F = [G (m
1
x m
2
)] / d
2
?
a) Distance between beginning points of masses
b) Distance between end points of masses
c) None of these
d) Distance between centres of masses
6.
What is ‘G’ in the formula: F = [G (m
1
x m
2
)] / d
2
called?
a) Universal constant of gravitation
b) Weight constant
c) Force of gravity
d) Friction constant
7.
By which of the following symbol, universal constant of gravitation is represented?
a) Symbol Cg
b) Symbol G
c) Symbol U
g
d) Symbol g
8.
The value of universal constant of gravitation is......................?
a) Different everywhere
b) May be same or different
c) Same everywhere
d) Change everywhere
9.
What is the value of universal constant of gravitation?
a) 7.763 x 10
-11
Nm
2
Kg
-2
b) 3.676 x 10
-11
Nm
2
Kg
-2
c) 7.676 x 10
-11
Nm
2
Kg
-2
d) .673 x 10
-11
Nm
2
Kg
-2
10.
What is the SI unit of universal constant of gravitation?
a) SI unit = Nm
-2
Kg
-2
b) SI unit = Nm
-2
Kg
2
c) SI unit = Nm
2
Kg
-2
d) SI unit = Nm
2
Kg
2
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