Work Done by a Constant Force and a Variable Force NEET Questions

Physics - Work, Energy, and Power

Work Done by a Constant Force and a Variable Force MCQ Questions


7.
Work done by a conservative force in a closed path is:
A.
Zero
B.
Positive
C.
Negative
D.
Depends on the path
😑 View Answer Rough Work Error
ANSWER :
A. Zero
8.
Work done in lifting a body of mass m to height h is:
A.
mgh
B.
mg/hmg/hmg/h
C.
mg+hmg + hmg+h
D.
m2gh
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ANSWER :
A. mgh
9.
Work done by a centripetal force is:
A.
Positive
B.
Negative
C.
Zero
D.
Maximum
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ANSWER :
C. Zero
10.
Work done by a spring force is:
A.
Positive
B.
Negative
C.
Zero
D.
Depends on direction of motion
😑 View Answer Rough Work Error
ANSWER :
D. Depends on direction of motion
11.
The SI unit of work is:
A.
Joule
B.
Newton
C.
Watt
D.
Pascal
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ANSWER :
A. Joule
12.
The minimum work done in pulling up a block of wood weighing 2 kN for a length of 10 m on a smooth plane inclined at an angle of 15° with the horizontal is: (Given: sin15° = 0.2588)

NEET - 2018

A.
4.36 kJ
B.
5.17 kJ
C.
8.91 kJ
D.
9.82 kJ
😑 View Answer Rough Work Error
ANSWER :
A. 4.36 kJ