The Potential Energy of Spring NEET Questions

Physics - Work, Energy, and Power

The Potential Energy of Spring MCQ Questions


1.
The restoring force law for an ideal spring obeying Hooke's law is:
A.
Fs = kx²
B.
Fs = −kx
C.
Fs = k/x
D.
Fs = kx
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ANSWER :
B. Fs = −kx
2.
The SI unit of the spring constant k is:
A.
N m (Newton-metre)
B.
J m⁻¹ (Joule per metre)
C.
N m⁻¹ (Newton per metre)
D.
kg m s⁻¹
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ANSWER :
C. N m⁻¹ (Newton per metre)
3.
If the potential energy of a spring is V when stretched by 2 cm, then its potential energy when stretched by 10 cm will be:

NEET - 2019

A.
V/25
B.
5V
C.
V/5
D.
25V
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ANSWER :
D. 25V
4.
A 'stiff' spring is one that has:
A.
Small k — compresses easily under small force
B.
Large k — requires large force for unit extension
C.
Negative k — force in direction of stretch
D.
k = 0 — no restoring force
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ANSWER :
B. Large k — requires large force for unit extension
5.
The spring force on a block attached to a spring when the spring is COMPRESSED (x < 0) is:
A.
Negative — spring pulls the block inward
B.
Zero — no force at compression
C.
Positive — spring pushes the block outward toward equilibrium
D.
Depends on the speed of compression
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ANSWER :
C. Positive — spring pushes the block outward toward equilibrium
6.
For a stretched spring (x > 0), the work done BY the spring force as the block moves from 0 to xm is:
A.
Positive — spring aids the extension
B.
Zero — no displacement
C.
Negative — spring force opposes extension
D.
Depends on the spring constant
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ANSWER :
C. Negative — spring force opposes extension