Conservative and Non Conservative Forces NEET Questions

Physics - Work, Energy, and Power

Conservative and Non Conservative Forces MCQ Questions


7.
Work is a:
A.
Vector quantity with direction same as force
B.
Vector quantity with direction same as displacement
C.
Scalar quantity that can be positive, negative, or zero
D.
Scalar quantity that is always positive
😑 View Answer Rough Work Error
ANSWER :
C. Scalar quantity that can be positive, negative, or zero
8.
Work done is zero when:
A.
Large force acts over long displacement
B.
Force and displacement are perpendicular (θ = 90°)
C.
Force is in same direction as displacement
D.
Both force and displacement are nonzero
😑 View Answer Rough Work Error
ANSWER :
B. Force and displacement are perpendicular (θ = 90°)
9.
A force is said to be conservative if:

NEET - 2018

A.
Work done depends only on the initial and final positions
B.
Work done depends on the path followed
C.
Work done is zero when the displacement is zero
D.
None of the above
😑 View Answer Rough Work Error
ANSWER :
A. Work done depends only on the initial and final positions
10.
A weightlifter holds a 150 kg mass stationary on his shoulder for 30 seconds. Work done by him on the load is:
A.
150 × 10 × 30 = 45000 J
B.
150 × 10 = 1500 J
C.
0 J (zero work)
D.
Cannot be determined
😑 View Answer Rough Work Error
ANSWER :
C. 0 J (zero work)
11.
A block moves on a smooth horizontal table. Which force does ZERO work on the block?
A.
Applied horizontal force
B.
Gravitational force (mg)
C.
Both gravitational force and normal force
D.
None of the forces
😑 View Answer Rough Work Error
ANSWER :
C. Both gravitational force and normal force
12.
A moon orbiting Earth in a perfectly circular orbit. Work done by Earth's gravitational force on the moon per orbit is:
A.
Equal to moon's kinetic energy
B.
Zero
C.
Equal to moon's potential energy
D.
Negative
😑 View Answer Rough Work Error
ANSWER :
B. Zero