Physics · JEE

Work, Energy and Power Concepts for JEE

82+ syllabus-aligned questions available

Quick answer

Master Work, Energy and 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, Energy and Power before speed practice. This guide covers what JEE expects and how to test yourself with MCQs.

Concept explainer

Concept overview for Work, Energy and Power covering 4 JEE syllabus subtopics including 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.

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
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 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
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 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.

JEE Formula Sheet

6+ important formulas for Work, Energy and Power

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Subtopics in Work, Energy and Power

View Work, Energy and Power formula sheet — 6+ JEE formulas

Free sample questions

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Q1PhysicsUnit 4: Work, Energy and Power

A cricket ball of mass

150 g

moving with a speed of

126 k m / h

hits at the middle of the bat, held firmly at its position by the batsman. The ball moves straight back to the bowler after hitting the bat. Assuming that collision between ball and bat is completely elastic and the two remain in constant for

0.001 s,

the force that the batsman had to apply to hold the bat firmly at its place would be:

Q2PhysicsUnit 4: Work, Energy and Power

Which one of the following statement is false?

Q3PhysicsUnit 4: Work, Energy and Power

A body of mass 5 kg has momentum of

10 \mathrm{kg} \mathrm{m} / \mathrm{sec} .

When a force of

0.2 \mathrm{N}

is applied on it for 10 sec, the change in its kinetic energy is:

Q4PhysicsUnit 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

25 \mathrm{kg}

and initial velocity is 2 m/s.When the distance covered by the bodyi

s 4 \mathrm{m},

its kinetic energy would be

Q5PhysicsUnit 4: Work, Energy and Power

\mathbf{A}

3 k g

object has initial velocity

(6 \hat{i}-

\mathbf{2} \hat{\boldsymbol{j}}) \boldsymbol{m} / \boldsymbol{s} .

The total work done on the object if its velocity changes to

(8 \hat{i}+

4 \hat{j}) m / s

is :

Q6PhysicsUnit 4: Work, Energy and Power

A wire suspended vertically from one of its ends is stretched by attaching a weight of

200 \mathrm{N}

to the lower end. The weight stretches the wire by 1 mm. Then the energy stored in the wire is

Q7PhysicsUnit 4: Work, Energy and Power

Potential energy is classified into which two energy?

Q8PhysicsUnit 4: Work, Energy and Power

Which of the following forms of energy is released or absorbed in most chemical reactions?

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Frequently asked questions

What concepts in Work, Energy and Power are essential for JEE?

Focus on core ideas across 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. JEE tests application, not just memorisation.