Work, Energy, and Power MCQs for NEET Physics with Answers

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Author at PW

March 13, 2026

Get ready for NEET by doing targeted work, energy, and power MCQs. This tutorial has solved problems about the work-energy theorem, potential energy, and power, along with comprehensive explanations to help you get a high score on the medical entrance exam.

Because physics is a mix of abstract ideas and strict maths, it can be hard for those who want to be doctors. A lot of students have trouble figuring out when to utilise force-based equations and when to employ energy conservation. This article has a great set of work energy and power MCQ for NEET that will help you learn these shortcuts and solve problems faster.

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Work Energy and Power Explanation in Simple Language

Before you start the practice set, keep in mind that the NEET MCQ often evaluates your knowledge of the difference between "conservative" and "non-conservative" forces. The work done by gravity and spring forces is only based on the starting and ending positions. Friction, on the other hand, is not conservative and turns energy into heat.

When solving MCQ for NEET, always look for the "system".The total mechanical energy (kinetic + potential) stays the same if there is no outside work and no friction. You don't need complicated free-body diagrams to solve around 40% of all NEET work energy and power MCQs with just this one rule.

Essential Formula Quick-Check

To solve any work energy and power MCQ for NEET, keep these relationships in mind:

Work (W): F.d cos(theta)
Kinetic Energy (K) = 1/2 mv^2
For springs, potential energy (U) is 1/2 kx^2, while for gravity, it is mgh.
Power (P) = Work / Time or Force times Velocity

Check Out: NEET Previous Year Papers

Work Energy and Power MCQ for NEET

Here are 10 carefully chosen multiple-choice questions (MCQs) based on the most common patterns seen in NEET questions on work power and energy

Q1. A body of mass 10 kg moves along a straight line with a velocity v = 5x^(3/2). The work done by the net force during its displacement from x = 0 to x = 2 m is:

A) 2000 J

B) 4000 J

C) 1000 J

D) 5000 J

Answer: C. (Using the Work-Energy Theorem: W = 1/2 m(v2^2 - v1^2). At x=0, v1=0. At x=2, v2=5(2^(3/2)). Square of v2 is 25 * 8 = 200. W = 0.5 * 10 * 200 = 1000 J).

Q2. A force F = -kx acts on a particle. The work done by this force in displacing the particle from x1 to x2 is:

A) 1/2 k(x2^2 - x1^2)

B) 1/2 k(x1^2 - x2^2)

C) kx2 - kx1

D) k(x1 - x2)

Answer: B. (Work done is the negative of the change in potential energy, calculated by integrating -kx from x1 to x2).

Q3. A car of mass m starts from rest and accelerates so that the instantaneous power delivered to the car has a constant magnitude P0. The instantaneous velocity of this car is proportional to:

A) t^(1/2)

B) t^(-1/2)

C) t^2

D) t

Answer: A. (Since P = Fv = m(dv/dt)v, integrating both sides gives v^2 proportional to t, meaning v is proportional to the square root of t).

Q4. A vertical spring is fixed at the bottom and has a spring constant k. A block of mass m is dropped from a height h above the top of the spring. The maximum compression x is given by:

A) mgh = 1/2 kx^2

B) mg(h+x) = 1/2 kx^2

C) mgh = 1/2 k(h+x)^2

D) mgx = 1/2 k(h+x)^2

Answer: B. (The total vertical drop is h+x, so the loss in gravitational potential energy is mg(h+x), which is stored as spring energy).

Q5. Two bodies with kinetic energies in the ratio 4:1 are moving with equal linear momentum. The ratio of their masses is:

A) 1:2

B) 1:1

C) 4:1

D) 1:4

Answer: D. (Since K = p^2 / 2m, if momentum p is constant, mass is inversely proportional to kinetic energy. Ratio = 1/4).

Q6. A uniform chain of length L and mass M is lying on a smooth table and one-third of its length is hanging vertically down over the edge. The work required to pull the hanging part on to the table is:

A) MgL

B) MgL/3

C) MgL/9

D) MgL/18

Answer: D. (Mass of hanging part is M/3. Its center of gravity is at L/6 below the table. Work = (M/3) * g * (L/6) = MgL/18).

Q7. An engine pumps up 100 kg of water through a height of 10 m in 5 seconds. If the efficiency of the engine is 60%, then the power of the engine is (Take g = 10 m/s^2):

A) 3.33 kW

B) 0.33 kW

C) 2.00 kW

D) 5.00 kW

Answer: A. (Output Power = mgh/t = 2000 W. Since efficiency is 0.6, Input Power = 2000 / 0.6 = 3333 W).

Q8. A bullet of mass 10 g leaves a rifle at 1000 m/s and strikes a target at the same level with a velocity of 500 m/s. The work done in overcoming air resistance is:

A) 3750 J

B) 5000 J

C) 7500 J

D) 4750 J

Answer: A. (Work done = 1/2 * 0.01 * (1000^2 - 500^2) = 0.005 * 750,000 = 3750 J).

Check Out: NEET Test series

Strategy for Work Energy and Power MCQ for NEET

To score high in the work energy and power MCQ for NEET focus on multi-concept integration. Often, NEET physics work energy and power MCQs combine circular motion with energy conservation. For instance, finding the tension at the bottom of a string when a bob is released from a certain height.

Practicing work energy power questions for NEET from previous years will reveal that the examiners love the relationship between momentum ($p$) and kinetic energy ($K$). Always remember the bridge: $K = \frac{p^2}{2m}$. This formula alone appears in various forms in work energy and power objective questions for NEET.

Final Revision Tips

Vector Notation: Be careful with dot products in work energy power MCQ NEET problems involving vector forces.
Variable Mass: For problems involving water jets or sand falling on belts, use $F = v(dm/dt)$.
Efficiency: Questions on work power energy involving motors, efficiency is always $\frac{Output}{Input}$.

Mastering this chapter is about more than just memorising formulas; it is about recognising which physical principle offers the path of least resistance. If you keep doing these work energy and power MCQ for NEET, you'll get the intuition you need to find ways to save energy and avoid long kinematic computations.

Use this guide as a guideline for your weekly review. As the exam gets closer, use these work energy and power MCQ for NEET to practise timed exams to improve both your speed and accuracy.

Work, Energy, and Power MCQs for NEET FAQs

Why is the work-energy theorem so important for work energy and power MCQ for NEET?

You may find out the end speed of an object without knowing the intermediate acceleration or time, which saves a lot of time on tests.

How do I handle friction in NEET on work power energy?

Treat work done by friction as negative work. It reduces the total mechanical energy of the system, usually converting it into heat.

What is the difference between instantaneous and average power in work energy power?

Average power is the total amount of work done over a certain amount of time. Instantaneous power is the dot product of force and velocity at a certain point in time.

Can I skip the integration for NEET MCQ?

Not entirely. You should at least know how to find the area under a force-displacement graph, as that is a graphical form of integration commonly tested.

Are work energy power objective questions for NEET usually taken from NCERT?

NCERT provides the foundation, but NEET often asks more complex applications involving multiple steps, which is why practising advanced MCQs is necessary.

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