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Physics · JEE

Important Questions: Work, Energy and Power for JEE

3+ syllabus-aligned questions available

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The most important Work, Energy and Power questions for JEE cover conceptual traps, standard results, and numerical patterns from Work done by a constant force and a variable force, kinetic and potential energies, work-energy theorem, power, The potential energy of a spring, conservation of mechanical energy, conservative and non-conservative forces, Motion in a vertical circle, Elastic and inelastic collisions in one and two dimensions. Goodmarks provides 3+ high-yield MCQs with full solutions.

Focus on what matters most. These important Work, Energy and Power questions cover high-weightage concepts from Work done by a constant force and a variable force, kinetic and potential energies, work-energy theorem, power, The potential energy of a spring, conservation of mechanical energy, conservative and non-conservative forces, Motion in a vertical circle, Elastic and inelastic collisions in one and two dimensions — the topics JEE repeats every year.

Subtopics in Work, Energy and Power

  • Work done by a constant force and a variable force, kinetic and potential energies, work-energy theorem, power
  • The potential energy of a spring, conservation of mechanical energy, conservative and non-conservative forces
  • Motion in a vertical circle
  • Elastic and inelastic collisions in one and two dimensions

Free sample questions

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Q1PhysicsUnit 4: Work, Energy and Power
A force acts on a 3g3 g particle in such a way that position of the particle as a function of time is given by x=3t−\boldsymbol{x}=\mathbf{3} \boldsymbol{t}- 4t2+t3,4 t^{2}+t^{3}, where xx is in metre and tt is in sec. The work done during the first 4s4 s is
Q2PhysicsUnit 4: Work, Energy and Power
Assertion A load when lifted vertically up requires greater effort than to roll the same load up the ramp. Reason The work done in lifting the load vertically up is less.
Q3PhysicsUnit 4: Work, Energy and Power
A single conservative force F(x)F(x) acts on a 1.0−kg1.0-k g particle that moves along the x-axis. The potential energy U(x)U(x) is given⁡by⁡U(x)=20+(x−2)2\operatorname{given} \operatorname{by} U(x)=20+(x-2)^{2} where xx is in meters. At x=5.0m,\boldsymbol{x}=\mathbf{5 . 0} \mathrm{m}, the particle has a kinetic energy of 20 J.What is the mechanical energy of the system?

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Frequently asked questions

What makes a Work, Energy and Power question "important" for JEE?

Important questions test core concepts that appear frequently across JEE Main and Advanced papers — definitions, standard formulas, and classic problem types.

Which subtopics in Work, Energy and Power are high-weightage?

Key areas include Work done by a constant force and a variable force, kinetic and potential energies, work-energy theorem, power, The potential energy of a spring, conservation of mechanical energy, conservative and non-conservative forces, Motion in a vertical circle, Elastic and inelastic collisions in one and two dimensions. Prioritise these before moving to edge cases.

How many important questions should I revise?

Revise 30–50 important MCQs per unit in the last month before JEE. Focus on questions you got wrong at least once.

Can I practise only important questions on Goodmarks?

Pro users can filter by unit and subtopic to target high-yield areas. Free users can attempt sample questions on this page.

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