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Online Tests
ECAT Physics Chapter 3 Motion and Force Online Test MCQs With Answers
Question # 1
A railway engine (mass 10
4
kg) is moving with a speed of 73 km/h. The force which should be applied to bring it to rest over a distance of 20 m is
Choose an answer
3,600 N
7,200 N
10,000 N
100,000 N
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Question # 2
When we consider the average velocity of a body, then the body is moving in
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straight line
curved path
may be in a straight or curved path
none of them
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Question # 3
For a moving body, at any instant of time
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If the body is not moving the acceleration is necessarily zero
If the body is slowing, the retardation is negative
If the body is slowing, the distance is negative
If displacement, velocity and acceleration at that instant are known, we can find the displacement at any given time in future
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Question # 4
A ball is dropped downwards After 1 second another ball is dropped downwards from the same point. What is the distance between them after 3 seconds
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25 m
20 m
50 m
9.8 m
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Question # 5
One newton is a force that produces an acceleration of 0.5 m/sec
2
in a body of mass:
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2 Kg
3 Kg
4 Kg
8 Kg
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Question # 6
A certain force gives an acceleration of 2 m/sec2 to a body if mass 5 kg. The same force would give a 29 kg object an acceleration of:
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0.5 m/sec2
5 m/sec2
1.5 m/sec2
9.8 m/sec2
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Question # 7
The projectile motion is composed of
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horizontal motion only
vertical motion only
horizontal and vertical motion
none of them
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Question # 8
The projectile attains maximum horizontal range when it is projected at an angle of
Choose an answer
30
°
45
°
60
°
75
°
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Question # 9
Body which falls freely under gravity provides good example of motion under:
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Uniform acceleration
Non-uniform acceleration
Uniform velocity
None of these
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Question # 10
The dimension of linear inertia is:
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MLT
2
ML
0
T
-2
ML
0
T
0
MLT
-1
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Question # 11
The direction of velocity is along the direction of
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distance
displacement
acceleration
all of them
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Question # 12
Velocity of a body changes if
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direction of the body changes
speed of the body changes
neither speed nor direction changes
either speed or direction changes
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Question # 13
An object is dropped from a height of 100 m. Its velocity at the moment it touches the ground is:
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100 m/sec
140 m/sec
1960 m/sec
196 m/sec
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Question # 14
Root out the conventional source of energy:
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Energy from blomass
hydroelectric energy
Geothermal energy
None of these
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Question # 15
A body whose momentum is constant must have constant
Choose an answer
Acceleration
Velocity
Force
None of these
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Question # 16
When a force is applied on a body, several effects are possible Which of the following effect could not occur?
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the body rotates
the body speeds up
the mass of the body decreases
the body changes its direction
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