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Online Tests
ECAT Physics Chapter 4 Work and Energy Online Test MCQs With Answers
Question # 1
A 100 Kg car is moving at the speed of 10 m/sec and comes to rest after covering a distance of 50 m. The amount of work done against the friction is:
Choose an answer
+5 X 10
1
J
+5 X 10
2
J
+5 X 10
3
J
+5 X 10
4
J
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Question # 2
Work is a
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Scalar quantity
Vector quantity
Base quantity
None of these
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Question # 3
A boy pulls a toy car through a distance of 5 m by applying a force of 0.5 N, which makes and angle of 60
° with the horizontal. The work done by the boy is:
Choose an answer
1.25 J
12.5 J
125 J
None of these
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Question # 4
The work done in moving a body between two points in a conservation field is independent of the:
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Direction
Force applied
Path followed by the body
Power
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Question # 5
Area under the force displacement graph gives
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Power
Work
Heat
Energy
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Question # 6
The space around the earth within which it expects a force of attraction on other bodies is known as:
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Nuclear field
Conservative field
Electric field
Gravitational field
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Question # 7
The tidal energy is due to gravitational pull of :
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sun
moon
Mars
None of these
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Question # 8
If force and displacement are in opposite direction, the work done is taken as:
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Positive work
Negative work
Zero work
Infinte work
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Question # 9
Which one is conservative force
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Electric force
Frictional force
Normal force
Air resistance
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Question # 10
A laborer carrying a load on his head moves from the rest on a horizontal road to another point where he comes to rest. He has done:
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Minimum Work
Maximum Work
Zero Work
Negative Work
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Question # 11
Which force is not a conservative force?
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Frictional force
Gravitational force
Electric force
Elastic spring force
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Question # 12
When velocity of moving body is doubled, the quantity which is also doubled is its:
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K.E.
Acceleration
Momentum
P.E.
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Question # 13
When a body moves against the force of friction on a horizontal plane, the work done by the body is:
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Positive
Negative
Zero
None of these
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Question # 14
Work done is independent of path followed in _______
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Gravitational field
Magnetic field
Electric field
All of these
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Question # 15
When a force of 0.5 N displaces a body through a distance of 2m in the direction of force, the work done is
Choose an answer
0.5 J
2 J
0.25 J
1 J
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Question # 16
Tick the conservative force
Choose an answer
Tension in a string
Air resistance
Elastic spring
Frictional force
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