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