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The potential energy of a spring, conservation of mechanical energy, conservative and non-conservative forces Concepts for JEE

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Master The potential energy of a spring, conservation of mechanical energy, conservative and non-conservative forces by understanding definitions, standard results, and typical JEE question patterns — then practise with syllabus-aligned MCQs on Goodmarks.

Build clear conceptual foundations for The potential energy of a spring, conservation of mechanical energy, conservative and non-conservative forces before speed practice. This guide covers what JEE expects and how to test yourself with MCQs.

Concept explainer

The potential energy of a spring, conservation of mechanical energy, conservative and non-conservative forces is a core JEE Main Physics subtopic under Work, Energy and Power. Master the definitions, standard results, and typical MCQ patterns tested in JEE Main and Advanced.

Key points

  • Understand the definition and scope of The potential energy of a spring, conservation of mechanical energy, conservative and non-conservative forces in the JEE syllabus
  • Memorise key formulas and standard results linked to The potential energy of a spring, conservation of mechanical energy, conservative and non-conservative forces
  • Practise 20–40 syllabus-aligned MCQs with step-by-step solutions

JEE tips

  • Revise The potential energy of a spring, conservation of mechanical energy, conservative and non-conservative forces with a one-page formula sheet before attempting mixed tests
  • After each practice set, log mistakes specific to The potential energy of a spring, conservation of mechanical energy, conservative and non-conservative forces and reattempt after 48 hours

Common trap

Students often rush The potential energy of a spring, conservation of mechanical energy, conservative and non-conservative forces questions without checking units, sign conventions, or boundary conditions — always verify assumptions before calculating.

Syllabus context

Part of Work, Energy and Power in JEE Main Physics.

Free sample questions

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Q1PhysicsUnit 4: Work, Energy and Power
A wire suspended vertically from one of its ends is stretched by attaching a weight of 200N200 \mathrm{N} to the lower end. The weight stretches the wire by 1 mm. Then the energy stored in the wire is
Q2PhysicsUnit 4: Work, Energy and Power
The potential energy of a system increases if work is done:
Q3PhysicsUnit 4: Work, Energy and Power
A spring with spring constants K when compressed by 1cm1 \mathrm{cm}, the potential energy stored is U.If it is further compressed by 3cm,3 \mathrm{cm}, then its final potential energy is
Q4PhysicsUnit 4: Work, Energy and Power
Two springs of force constants 1000N/m\mathbf{1 0 0 0} N / \boldsymbol{m} and 2000N/m\mathbf{2 0 0 0} \boldsymbol{N} / \boldsymbol{m} are stretched by same force. The ratio of their respective potential energies is
Q5PhysicsUnit 4: Work, Energy and Power
Assertion Graph between potential energy of a spring versus the extension or compression of the spring is a straight line Reason Potential energy of a stretched or compressed spring is proportional to square of extension or compression
Q6PhysicsUnit 4: Work, Energy and Power
Which quantity of a two particles system depend only on the separation between the two particles?
Q7PhysicsUnit 4: Work, Energy and Power
A spring is kept compressed by a toy car of mass 150g.150 g . On releasing the car it moves with a speed of 0.2ms−1.0.2 m s^{-1} . So, the elastic potential energy of the spring is
Q8PhysicsUnit 4: Work, Energy and Power
A car of mass 1000kg1000 \mathrm{kg} moving with a speed 18kmh−118 k m h^{-1} on a smooth road and colliding with a horizontally mounted spring of spring constnat 6.25×6.25 \times 103Nm−1.10^{3} N m^{-1} . The maximum compression of the spring is

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