Conservative and Non Conservative Forces NEET Questions

Physics - Work, Energy, and Power
Conservative and Non Conservative Forces

Conservative and Non Conservative Forces MCQ Questions


1.
In physics, work done by a force F on a body undergoing displacement d is defined as:
A.
W = F × d (always)
B.
W = F·d = Fd cosθ (where θ is angle between F and d)
C.
W = F + d
D.
W = Fd sinθ
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ANSWER :
B. W = F·d = Fd cosθ (where θ is angle between F and d)
2.
The work done by a force on a body is said to be the product of:
A.
Magnitude of force and speed
B.
Magnitude of displacement and the component of force along displacement
C.
Force and time
D.
Force and acceleration
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ANSWER :
B. Magnitude of displacement and the component of force along displacement
3.
The SI unit of work is:
A.
Newton (N)
B.
Watt (W)
C.
Joule (J)
D.
Pascal (Pa)
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ANSWER :
C. Joule (J)
4.
The dimensional formula of work is:
A.
[MLT⁻¹]
B.
[ML²T⁻²]
C.
[ML²T⁻³]
D.
[MLT⁻²]
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ANSWER :
B. [ML²T⁻²]
5.
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
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ANSWER :
C. Scalar quantity that can be positive, negative, or zero
6.
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
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ANSWER :
B. Force and displacement are perpendicular (θ = 90°)
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