Proven Strategies to Excel in JEE Main Work, Energy and Power Mock Tests
Work, Energy, and Power is one of the most scoring chapters in JEE Physics, emphasizing crucial laws of mechanics and different forms of energy transformations. Mastering this chapter lays a strong foundation for understanding motion, collisions, and power calculation. Attempt this mock test to sharpen your conceptual clarity, problem-solving speed, and boost your JEE Main 2025 preparation!
Mock Test Instructions for the Work Energy and Power Mock Test-3:
- 20 questions from Work Energy and Power Mock Test-3
- Time limit: 20 minutes
- Single correct answer per question
- Correct answers appear in bold green after submission
Why Taking Mock Tests Is the Best Way to Master Work, Energy and Power for JEE?
- Identify common misconceptions in work calculations and solve similar MCQs regularly.
- Boost your accuracy on energy conservation problems with real-time test feedback.
- Practice MCQs on collision and power numericals to enhance time-management skills.
- Track your understanding of the Work-Energy Theorem with test performance analytics.
- Spot your weak areas in variable forces and improve through repeated topic-wise mock tests.
Strengthen Your JEE Preparation: Mock Tests on Work, Energy and Power by Experts
- Train with expert-crafted MCQs aligned with latest JEE Main trends and PYQ patterns.
- Build conceptual clarity on potential/kinetic energy and power calculations.
- Refine your revision by simulating exam-like time pressure for this high-weightage chapter.
- Instant answer key and detailed score breakdown for every attempt help you spot and fix errors.
- Solve challenging questions on path dependence, conservative/non-conservative forces, and boost exam confidence.
Subject-Wise Excellence: JEE Main Mock Test Links
| S.No. | Subject-Specific JEE Main Online Mock Tests |
|---|---|
| 1 | Online FREE Mock Test for JEE Main Chemistry |
| 2 | Online FREE Mock Test for JEE Main Maths |
| 3 | Online FREE Mock Test for JEE Main Physics |
Important Study Materials Links for JEE Exams
FAQs on JEE Main Work, Energy and Power Mock Test 2025-26 – Practice & Solutions
1. What is work in physics?
Work in physics is defined as the product of the force applied on an object and the displacement in the direction of the force. Mathematically, work (W) = Force (F) × Displacement (s) × cosθ, where θ is the angle between the force and displacement vectors. The SI unit of work is Joule (J).
2. What is the law of conservation of energy?
The law of conservation of energy states that energy can neither be created nor destroyed, but can only change from one form to another. The total energy in a closed system remains constant at all times, even though it may be converted between kinetic energy, potential energy, heat energy, or other forms.
3. State the SI units of work, energy, and power.
The SI unit of work is Joule (J), for energy it is also Joule (J), and the SI unit of power is Watt (W). 1 Watt is equal to 1 Joule per second (1 W = 1 J/s).
4. What is power? How is it related to work and time?
Power is the rate at which work is done or energy is transferred over time. It is given by the formula: Power (P) = Work (W) / Time (t). The faster the work is done, the greater the power.
5. Give one example each of potential energy and kinetic energy.
Potential energy example: A stretched bow or a stone kept at a certain height above the ground.
Kinetic energy example: A moving car or a flowing river.
6. What is mechanical energy? State its two forms.
Mechanical energy is the sum of the kinetic energy and potential energy possessed by an object due to its motion and position. The two forms are:
1. Kinetic energy (energy due to motion)
2. Potential energy (energy due to position or configuration)
7. Write the expression for kinetic energy and explain each term.
Kinetic energy (KE) is given by the formula: KE = ½ mv², where:
• m = mass of the object (in kg)
• v = velocity of the object (in m/s)
This formula shows that kinetic energy depends on both the mass and the square of the velocity.
8. Why is no work done when you push a wall?
No work is done when you push a wall if the wall does not move, because work requires displacement in the direction of force applied. Since the wall remains stationary, the displacement is zero, and therefore, the work done is also zero.
9. How can you increase the power of a machine?
Power of a machine can be increased by:
• Increasing the amount of work done within a given time
• Decreasing the time taken to do a given amount of work
Thus, either perform more work in the same time or do the same work in less time to enhance power.
10. List two daily life examples where work, energy, and power are applied.
Examples of work, energy, and power in daily life:
• Work: Lifting a school bag from the ground (force is applied and bag is displaced upwards).
• Energy: A compressed spring storing potential energy.
• Power: An electric bulb converting electrical energy into light and heat rapidly.
11. State the work-energy theorem.
The work-energy theorem states that the work done by the net force acting on an object is equal to the change in its kinetic energy. Mathematically, Work (W) = Final kinetic energy (KE₂) – Initial kinetic energy (KE₁).
12. What is the relationship between horsepower and watt?
One horsepower (hp) is equal to 746 watts. This unit is commonly used to describe the power output of engines and motors, where 1 hp = 746 W.
