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Online Tests
Physics ECAT Pre Engineering Chapter 3 Motion and Force Online Test MCQs With Answers
Question # 1
When a person jumps off the ground, the reaction force of the ground is
Choose an answer
greater than the weight of the person
smaller than the weight of the person
equal to the weight of the person
zero
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Question # 2
If m is the mass of the gases ejected per second with velocity v relative to the rocket of mass M, then the acceleration of rocket is
Choose an answer
a = M/mv
a = mM/v
a = mv/M
a = v/mm
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Question # 3
In an elevator moving vertically up with an acceleration 'g' the force exerted on the floor by a passenger of mass M is
Choose an answer
Mg
1/2 Mg
Zero
2 Mg
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Question # 4
If the velocity time graph is a straight line parallel to time-axis, then it means that:
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The body is moving with uniform velocity
The body is moving with uniform acceleration
The body is at rest
None of above
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Question # 5
The path (or trajectory) described by a projectile is
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a parabola
a hyperbola
a circle
a straight line
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Question # 6
A car moves for half of its time at 80 km/h and rest half of time at 40 km/h, The total distance covered is 60 km. What is the average speed of the car?
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60 km/hr
80 km/hr
120 km/hr
180 km/hr
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Question # 7
A body of weight 1 N has a kinetic energy of 1 joule when its speed is:
Choose an answer
1.46 m sec
-1
2.44 m sec
-1
3.42 m sec
-1
4.43 m sec
-1
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Question # 8
If two bodies of equal masses moving in the same direction collide elastically, then their velocities.
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Are added
Are subtracted
Do not change
Are exchanged
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Question # 9
The decrease in velocity per unit time is called
Choose an answer
deceleration
acceleration
uniform acceleration
variable acceleration
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Question # 10
A ball is thrown upwards with a velocity of 100 m/s. It will reach the ground after
Choose an answer
10 s
20 s
5 s
40 s
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Question # 11
Change in momentum is one second is called:
Choose an answer
Impulse
Force
Energy
Work
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Question # 12
A motorist travels A to B at a speed at 40 km/h and returns at speed of 60km/h. His average speed will be
Choose an answer
40 km/h
48 km/h
50 km/h
60 km/h
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Question # 13
In equation F=ma, then mass 'm' is
Choose an answer
rest mass
variable mass
inertial mass
gravitational mass
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Question # 14
The consumption of energy by a 1000 watt heter in half an hour is:
Choose an answer
5 Kwh
0.5 Kwh
2.5 Kwh
3.2 Kwh
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Question # 15
The effect of applying a force on a moving body is to change
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its direction of motion only
its speed of motion only
both the direction and speed of motion
its inertia only
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Question # 16
If a train traveling at 72 kmph is to be brought to rest in a distance of 200 meters then its retardation should be
Choose an answer
20 ms
-2
10 ms
-2
2 ms
-2
1 ms
-2
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