Engineering Entrance Sample Papers

Acceleration Due to Gravity Worksheet (Physics)

acceleration due to gravity worksheet

MCQ on Acceleration due to Gravity

Question 1
An object weights 72 N on earth. Its weight at a height of R/2 from earth is
A
32 N
B
56 N
C
72 N
D
Zero
Question 2
A research satellite of mass 200 kg circles the earth in an orbit of average radius 3R/2 where R is the radius of the earth. Assuming the gravitational pull on a mass of 1 kg on the earth’s surface to be 10 N, the pull on the satellite will be
A
880 N
B
890 N
C
889 N
D
892 N
Question 3
In order to find time, the astronaut orbiting in an earth satellite should use
A
Either a pendulum clock or a watch
B
A watch having main spring to keep it going
C
Neither a pendulum clock nor a watch
D
A pendulum clock
Question 4
A body has a weight 90 kg on the earth's surface, the mass of the moon is 1/9 that of the earth's mass and its radius is 1/2 that of the earth's radius. On the moon the weight of the body is
A
202.5 kg
B
45 kg
C
90 kg
D
40 kg
Question 5
The acceleration of a body due to the attraction of the earth (radius R) at a distance 2 R from the surface of the earth is (g = acceleration due to gravity at the surface of the earth)
A
g/9
B
g/3
C
g
D
g/4
Question 6
If it is assumed that the spinning motion of earth increases, then the weight of a body on equator
A
Increases
B
Becomes more at poles
C
Remains constant
D
Decreases
Question 7
Weight of a body of mass m decreases by 1% when it is raised to height h above the earth’s surface. If the body is taken to a depth h in a mine, change in its weight is
A
0.5% decrease
B
1% increase
C
0.5% increase
D
2% decrease
Question 8
As we go from the equator to the poles, the value of g
A
Increases
B
Decreases
C
Remains the same
D
Decreases upto a latitude of 45°
Question 9
If the angular speed of the earth is doubled, the value of acceleration due to gravity (g) at the north pole
A
Doubles
B
Becomes zero
C
Becomes half
D
Remains same
Question 10
Acceleration due to gravity decreases as we go up from the surface of the earth. Then in going below the surface of the earth it

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A
Increases
B
Remains constant
C
Decreases
D
Decreases then increases
Question 11
An iron ball and a wooden ball of the same radius are released from a height ‘h’ in vacuum. The time taken by both of them to reach the ground is
A
Unequal
B
Exactly equal
C
Roughly equal
D
Zero
Question 12
Radius of earth is around 6000 km. The weight of body at height of 6000 km from earth surface becomes
A
No change
B
Half
C
One third
D
One-fourth
Question 13
A man can jump to a height of 1.5 m on a planet A. What is the height he may be able to jump on another planet whose density and radius are, respectively, one-quarter and one-third that of planet A
A
18 m
B
28 m
C
1.5 m
D
15 m
Question 14
If the Earth losses its gravity, then for a body

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A
Weight becomes zero, but not the mass
B
Mass becomes zero, but not the weight
C
Both mass and weight become zero
D
Neither mass nor weight become zero
Question 15
If both the mass and the radius of the earth decrease by 1%, the value of the acceleration due to gravity will
A
Decrease by 1%
B
Remain unchanged
C
Increase by 2%
D
Increase by 1%
Question 16
Weight of a body is maximum at

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A
Centre of Earth
B
Moon
C
Equator of Earth
D
Poles of earth
Question 17
If mass of a body is M on the earth surface, then the mass of the same body on the moon surface is
A
M
B
M/6
C
Zero
D
None of these
Question 18
If the radius of the earth shrinks by 1.5% (mass remaining same), then the value of acceleration due to gravity changes by
A
3%
B
1%
C
2%
D
4%
Question 19
The time period of a simple pendulum on a freely moving artificial satellite is
A
Zero
B
3 sec
C
Infinite
D
2 sec
Question 20
Spot the wrong statement : The acceleration due to gravity ‘g’ decreases if
A
We go up from the surface of the earth
B
We go down from the surface of the earth towards its centre
C
The rotational velocity of the earth is increased
D
We go from the equator towards the poles on the surface of the earth
Question 21
Force of gravity is least at

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A
None of these
B
The poles
C
The equator
D
A point in between equator and any pole
Question 22
If the value of ‘g’ acceleration due to gravity, at earth surface is 10 m/s2, its value in m/s2 at the centre of the earth, which is assumed to be a sphere of radius ‘Rmetre and uniform mass density is
A
10/R
B
5
C
Zero
D
10/2R
Question 23
If the earth rotates faster than its present speed, the weight of an object will
A
Decrease at the equator but remain unchanged at the poles
B
Remain unchanged at the equator but increase at the poles
C
Increase at the equator but remain unchanged at the poles
D
Remain unchanged at the equator but decrease at the poles
Question 24
A body weight 500 N on the surface of the earth. How much would it weigh half way below the surface of the earth
A
125 N
B
250 N
C
500 N
D
1000 N
Question 25
When a body is taken from the equator to the poles, its weight
A
Remains constant
B
Increases
C
Decreases
D
Increases at N-pole and decreases at S-pole
Question 26
The depth at which the effective value of acceleration due to gravity is g/4 is

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A
R/2
B
3R/4
C
R
D
R/4
There are 26 questions to complete.

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