Top Work Energy Power Questions for NEET
The chapter Work, Energy, and Power is one of the most scoring and concept-based units in NEET Physics. Almost every year, at least 2–3 questions are asked from this chapter, either directly or in combination with mechanics problems. This article on Top 5 Work Energy Power Questions is carefully designed to help you master the most important PYQs, strengthen conceptual clarity, and improve numerical accuracy.
Understanding the Top 5 Work Energy Power Questions is essential because this chapter connects force, motion, and energy in a very logical way. If you are clear with concepts like work done by variable forces, conservation of energy, and power, you can solve even tricky questions easily.
Importance of Work Energy Power for NEET
Before solving the Top 5 Work Energy Power Questions, it is important to understand the weightage and relevance of this chapter. Many NEET questions are based on conservation principles rather than direct formula application. Students often make mistakes because they try to apply formulas blindly instead of analyzing energy transformations.
Practicing the Top 5 Work Energy Power Questions ensures that you develop a strong grip on both theory and application.
Top 5 Work Energy Power Questions (With Detailed Concepts)
Question 1: Work Done by a Constant Force
A force of 10 N acts on a body and displaces it by 5 m in the same direction. Find the work done.
This is the most basic and frequently asked type in the Top 5 Work Energy Power Questions. Work done is defined as the product of force and displacement in the direction of force.
W=F⋅s
Substituting values, W = 10 × 5 = 50 J. This question reinforces the definition of work and is highly scoring.
Question 2: Work Done by Gravity
A body of mass 2 kg is dropped from a height of 10 m. Find the work done by gravity.
This is a very common concept tested in the Top 5 Work Energy Power Questions. Work done by gravity equals the change in potential energy.
W=mgh
W = 2 × 10 × 10 = 200 J. The key idea is that gravity always does positive work when motion is downward.
Question 3: Work-Energy Theorem
A force accelerates a body from rest to 10 m/s. If mass = 2 kg, find the work done.
This is one of the most important applications in the Top 5 Work Energy Power Questions. The work-energy theorem states that work done equals change in kinetic energy.
W=21mv2−21mu2
Since initial velocity is zero, W = ½ × 2 × (10)² = 100 J.
Question 4: Conservation of Mechanical Energy
A body is dropped from a height of 20 m. Find its velocity just before hitting the ground.
This is a high-frequency concept in the Top 5 Work Energy Power Questions. Using conservation of energy:
mgh=21mv2
Cancelling mass, v = √(2gh) = √(2 × 10 × 20) = √400 = 20 m/s.
Question 5: Power Calculation
A machine does 500 J of work in 5 seconds. Find power.
Power is the rate of doing work and is commonly tested in the Top 5 Work Energy Power Questions.
P=tW
P = 500 / 5 = 100 W.
Concept Summary for Quick Revision
The Top 5 Work Energy Power Questions cover all the core ideas required for NEET:
Work done by constant force, gravitational work, work-energy theorem, conservation of energy, and power. These concepts form the base for solving both simple and advanced problems.
Additional Practice Questions (Concept-Based Rapid Revision with Solutions)
To strengthen your preparation, here are additional problems based on the Top 5 Work Energy Power Questions.
Question 1
A force of 20 N moves a body by 3 m. Find work done.
Using W = F × s → 20 × 3 = 60 J
Answer: 60 J
Question 2
Find kinetic energy of a 2 kg body moving at 5 m/s.
KE = ½mv² = ½ × 2 × 25 = 25 J
Answer: 25 J
Question 3
A body is lifted to a height of 5 m. Mass = 4 kg. Find potential energy.
PE = mgh = 4 × 10 × 5 = 200 J
Answer: 200 J
Question 4
A machine does 1000 J work in 10 s. Find power.
P = 1000 / 10 = 100 W
Answer: 100 W
Question 5
A body falls freely. What happens to potential energy?
It decreases while kinetic energy increases.
Answer: Decreases
Question 6
A body of mass 1 kg moves at 10 m/s. Find kinetic energy.
KE = ½ × 1 × 100 = 50 J
Answer: 50 J
Question 7
If velocity doubles, what happens to kinetic energy?
KE ∝ v² → becomes 4 times
Answer: 4 times
Question 8
A force does negative work. What does it mean?
Force opposes displacement.
Answer: Opposes motion
Question 9
Find work done when force is perpendicular to displacement.
W = F s cos90° = 0
Answer: 0 J
Question 10
A 5 kg body is at rest. What is its kinetic energy?
Velocity = 0 → KE = 0
Answer: 0 J
Preparation Strategy Using Top 5 Work Energy Power Questions
To master the Top 5 Work Energy Power Questions, focus on understanding energy transformations rather than memorizing formulas. Practice applying conservation of energy in different scenarios and solve PYQs regularly.
Repeated revision of the Top 5 Work Energy Power Questions will significantly improve your problem-solving speed and accuracy.
Common Mistakes to Avoid
While solving the Top 5 Work Energy Power Questions, students often forget sign conventions in work, misuse conservation of energy, or ignore direction of forces. Avoiding these mistakes can easily boost your score.
Final Thoughts
The Top 5 Work Energy Power Questions presented here are among the most important patterns for NEET. If you can confidently solve these and understand the concepts, you will find this chapter extremely scoring.
FAQ Section
What is the weightage of Work Energy Power in NEET?
Usually 2–3 questions are asked.
Is Work Energy Power easy for NEET?
Yes, if concepts are clear and practiced properly.
How to revise this chapter quickly?
Focus on formulas, PYQs, and conservation of energy problems.