9 th class Chapter No.5 Past Paper MCQs
HAMZA SCIENCE ACADEMY
Physics MCQs Test Class 9th
Chapter # 5
GRAVITATION
1. Earth’s gravitational force of attraction
vanishes at:
(A)
6400 Km
(B)
Infinity
(C)
42300 Km
(D) 1000 Km
2. The value of ‘g’ at a height one earth’s
radius above the surface of the earth is:
(A)
2 g
(B)
g
(C)
g
(D)
g
3. Near the surface of earth, the gravitational
field strength is:
(A)
5 NKg-1
(B)
6 NKg-1
(C)
8 NKg-1
(D) 10 NKg-1
4. A force which is inversely proportional to the
square of the distance between the centers
of bodies is:
(A)
Frictional force
(B)
Centrifugal force
(C)
Centripetal force
(D) Gravitational force
5. The value of ‘g’ on moon’s surface is:
(A)
1.6 ms-1
(B)
1.6 cms-2
(C)
1.6 ms-2
(D) 1.6 Kms-1
6. Value of ‘g’ increases with the _________.
(A)
Increases in mas of a body
(B)
Increase in altitude
(C)
Decrease in altitude
(D) Increase in weight of a body
7. The value of ‘g’ at Jupiter is:
(A)
1.62 ms-2
(B)
9.8 ms-2
(C)
10 ms-2
(D)
25.94 ms-2
8. The value of
g on Moon’s surface is 1.6ms-2. What will be the weight of a
10 Kg body
on the surface of a Moon?
(A)
10 N
(B)
16 N
(C)
100 N
(D)
160 N
9. Value of gravitational
acceleration at 1000 Km above the surface of earth is:
(A)
3.7 ms-2
(B)
7.3 ms-2
(C)
37.3 ms-2
(D) 9.8 ms-2
10. The orbital speed of a low
orbit satellite is:
(A)
Zero
(B)
8 ms-1
(C)
800 ms-1
(D) 8000 ms-1
11. The moon is nearly ______
away from the earth.
(A)
3,80,000
Km
(B)
3,800 Km
(C)
37,000 Km
(D) 3,70,000 Km
12. The moon completes its one
revolution around the earth in:
(A)
25.3 days
(B)
27.3 days
(C)
29.3 days
(D) 31.3 days
13. The idea was put up first
by:
(A)
Galileo
(B)
Isaac Newton
(C)
Hooke
(D) Einstein
14.
The centripetal acceleration is inversely proportional to:
(A)
Mass
(B)
Velocity
(C)
Radius
(D) Mass and radius
15. The mass of earth is:
(A)
6
104 Kg
(B)
6
1014 Kg
(C)
6
1024 Kg
(D) 6
1024 N
16. The value of ‘g’ on Mars
surface is:
(A)
3.73
ms-2
(B)
1.62 ms-2
(C)
8.87 ms-2
(D) 10 ms-2
17. Centripetal force is
directly proportional to:
(A)
m2
(B)
v2
(C)
v
(D)
r
18. The velocity of
geostationary satellites with respect to earth is:
(A)
Zero
(B)
5
Kmh-1
(C)
10 Kmh-1
(D) 15 Kmh-1
19. The altitude of
geostationary orbits in which communication satellites are lunched
above the surface of earth is:
(A)
850 Km
(B)
1000 Km
(C)
6400 Km
(D) 42300 Km
20. The total number of
satellites in global positioning system is:
(A)
12
(B)
22
(C)
24
(D)
25
21. Value of gravitational
constant ‘G’ is:
(A)
6.67
10-9 Nm2
Kg-2
(B)
6.67
10-10 Nm2
Kg-2
(C)
6.67
10-11 Nm2
Kg-2
(D) 6.67
10-12 Nm2 Kg-2
22. According to the law of
gravitation ‘F’ is equal to:
(A) G
(B) G
(C) G
(D) G
23.
The
mass of earth is:
(A)
200N
(B)
300N
(C)
400N
(D)
500N
24.
Value
of g at sea level is ________than hill.
(A) Less
(B) greater
(C) equal
(D) half
25.
Formula
of mass of Earth is:
(A)
(B)
(C)
(D)
26.
The
speed of geostationary satellite with respect to earth is:
(A) Double
(B) same
(C) zero
(D) less
27.
The
speed of a satellite nearest to the earth’s orbit is:
(A) 6
(B) 7
(C) 8
(D) 10
28.
The
height of a geostationary satellite is about:
(A) 42300 km
(B) 6400 km
(C) 10000 km
(D) 38000 km
29.
Which
force rotates the body in a circle?
(A) magnetic force
(B) gravitational force
(C) centripetal force
(D) centrifugal force
30.
Orbital
speed of artificial satellite
is:
(A)
(B)
(C)
(D)
31.
Value
of g at the surface of the earth is:
(A) 7.8
(B) 12
(C) 10
(D) 11
32.
The
value of ‘g’ on sun is:
(A) 8.87
(B) 25.94
(C) 274.2
(D) 9.8
33.
The
height of geostationary satellite from the earth is nearly equal to:
(A)
(B)
(C)
(D)
34. Radius of earth is:
(A)
(B)
(C)
(D)
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