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Work done by a constant force and a variable force, kinetic and potential energies, work-energy theorem, power Concepts for JEE

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Quick answer

Master Work done by a constant force and a variable force, kinetic and potential energies, work-energy theorem, power by understanding definitions, standard results, and typical JEE question patterns — then practise with syllabus-aligned MCQs on Goodmarks.

Build clear conceptual foundations for Work done by a constant force and a variable force, kinetic and potential energies, work-energy theorem, power before speed practice. This guide covers what JEE expects and how to test yourself with MCQs.

Concept explainer

Work done by a constant force and a variable force, kinetic and potential energies, work-energy theorem, power 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 Work done by a constant force and a variable force, kinetic and potential energies, work-energy theorem, power in the JEE syllabus
  • Memorise key formulas and standard results linked to Work done by a constant force and a variable force, kinetic and potential energies, work-energy theorem, power
  • Practise 20–40 syllabus-aligned MCQs with step-by-step solutions

JEE tips

  • Revise Work done by a constant force and a variable force, kinetic and potential energies, work-energy theorem, power with a one-page formula sheet before attempting mixed tests
  • After each practice set, log mistakes specific to Work done by a constant force and a variable force, kinetic and potential energies, work-energy theorem, power and reattempt after 48 hours

Common trap

Students often rush Work done by a constant force and a variable force, kinetic and potential energies, work-energy theorem, power 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

Attempt 8 free MCQs for Work done by a constant force and a variable force, kinetic and potential energies, work-energy theorem, power. Unlock 38+ more with Pro.

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Q1PhysicsUnit 4: Work, Energy and Power
Which one of the following statement is false?
Q2PhysicsUnit 4: Work, Energy and Power
A body of mass 5 kg has momentum of 10kgm/sec.10 \mathrm{kg} \mathrm{m} / \mathrm{sec} . When a force of 0.2N0.2 \mathrm{N} is applied on it for 10 sec, the change in its kinetic energy is:
Q3PhysicsUnit 4: Work, Energy and Power
The graph between the resistive force acting on a body and the position of the body travelling in a straight line is shown in the figure. The mass of the body is 25kg25 \mathrm{kg} and initial velocity is 2 m/s.When the distance covered by the bodyi s4m,s 4 \mathrm{m}, its kinetic energy would be
Q4PhysicsUnit 4: Work, Energy and Power
A\mathbf{A} 3kg3 k g object has initial velocity (6i^−(6 \hat{i}- 2j^)m/s.\mathbf{2} \hat{\boldsymbol{j}}) \boldsymbol{m} / \boldsymbol{s} . The total work done on the object if its velocity changes to (8i^+(8 \hat{i}+ 4j^)m/s4 \hat{j}) m / s is :
Q5PhysicsUnit 4: Work, Energy and Power
Potential energy is classified into which two energy?
Q6PhysicsUnit 4: Work, Energy and Power
Which of the following forms of energy is released or absorbed in most chemical reactions?
Q7PhysicsUnit 4: Work, Energy and Power
A boy throws a ball of mass 0.5kg0.5 \mathrm{kg} upwards with an initial speed of 14m/s14 \mathrm{m} / \mathrm{s} The ball reaches a maximum height of 8m. The amount of energy dissipated by air drag acting on the ball during the ascent is
Q8PhysicsUnit 4: Work, Energy and Power
A bullet is fired at a target with a velocity 80m/s80 \mathrm{m} / \mathrm{s} and penetrates 50cm50 \mathrm{cm} into it. If this bullet were fired into a target 25cm25 \mathrm{cm} thick with equal velocity, with what velocity would it emerge, supposing the resistance to be uniform and the same in both the cases?

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