Elementary Ideas of Work NDA Questions

NDA Physics

Elementary Ideas of Work MCQ Questions


13.
What is the definition of work in physics?
A.
Force applied over a distance
B.
Motion of an object in the direction of applied force
C.
Force multiplied by time
D.
Energy exerted on an object
😑 View Answer Rough Work Error
ANSWER :
A. Force applied over a distance
14.
An object is moving at a constant speed in a circular path What is the total work done by the centripetal force?
A.
Positive
B.
Zero
C.
Negative
D.
Undefined
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ANSWER :
B. Zero
15.
What is the SI unit of work?
A.
Joule
B.
Newton
C.
Watt
D.
Pascal
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ANSWER :
A. Joule
16.
Work is defined as the product of
A.
Force and displacement in the same direction
B.
Force and displacement in perpendicular directions
C.
Force and time
D.
Force and velocity
😑 View Answer Rough Work Error
ANSWER :
A. Force and displacement in the same direction
17.
Which of the following statements is true about work done by a force?
A.
Work is always positive
B.
If the force is perpendicular to the displacement, no work is done
C.
Work is always negative
D.
Work is done only if there is motion
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ANSWER :
B. If the force is perpendicular to the displacement, no work is done
18.
When a book is lifted vertically upwards, the work done by gravity is
A.
Negative
B.
Positive
C.
Zero
D.
Cannot be determined
😑 View Answer Rough Work Error
ANSWER :
A. Negative