Frequently Asked Laws of Motion Questions for JEE/NEET with Solutions
FAQs on Law of Motion: Important Questions, Answers & Exam Tips
1. What are the important questions of motion?
Important questions of motion usually focus on conceptual understanding and numerical applications of Newton's Laws of Motion. For exams like JEE Main, NEET, and CBSE Boards, students should practice the following types of problems:
- Derivations and statements of Newton’s First, Second, and Third Laws
- Free body diagram questions
- Problems involving friction, especially kinetic and static friction
- Inclined plane and pulley-based questions
- Numerical problems applying F = ma and related formulas
- Previous year objective and subjective questions on laws of motion
2. What are the important points in the laws of motion?
Laws of motion revolve around three core principles set by Newton. The important points are:
- Newton’s First Law (Law of Inertia): An object remains at rest or in uniform motion unless acted upon by a net external force.
- Newton’s Second Law: The rate of change of momentum is proportional to the net force applied (F = ma).
- Newton’s Third Law: Every action has an equal and opposite reaction.
- Understanding how to construct free body diagrams.
- Concepts of inertia, mass, and force.
- The effects of friction on motion.
3. What was Newton's big question?
Sir Isaac Newton's big question was: What causes objects to move and what keeps them in motion or at rest? He explored the fundamental principles underlying how forces affect the motion of objects.
- Formulated the three Laws of Motion
- Wanted to explain everyday phenomena like falling objects, planetary motion, and friction
- His work laid the foundation for classical mechanics covered in the science syllabus
4. How to solve laws of motion questions?
To solve laws of motion questions efficiently, follow a systematic approach:
- Carefully read the question and visualize the scenario.
- Draw a free body diagram (FBD) showing all forces.
- Apply Newton’s Laws, choosing appropriate equations (F = ma, frictional force, etc.).
- Solve the equations step by step, being careful with units and vector directions.
- Check your answer for physical consistency.
5. Which topics in Laws of Motion are most asked in NEET/Boards?
In NEET and Boards, questions from Laws of Motion often cover:
- Newton’s Laws and their applications
- Friction (static, limiting, and kinetic)
- Problems on inclined planes, pulleys, and connected bodies
- Free body diagrams
- Common misconceptions (like misinterpretation of action-reaction pairs)
- Previous year numericals and multiple-choice questions
6. What steps to follow to solve friction-based laws of motion questions?
Solving friction-based laws of motion questions involves the following steps:
- Identify all surfaces where friction acts and determine the type (static or kinetic).
- Draw a free body diagram with forces including friction.
- Apply Newton’s Second Law in the horizontal and vertical directions separately.
- Use friction formulas: Frictional force = μN (μ = coefficient of friction, N = normal reaction)
- Solve the equations for the required physical quantity.
7. What is a free body diagram and why is it important in solving laws of motion problems?
A free body diagram (FBD) is a visual representation showing all external forces acting on a single object. It is crucial in laws of motion problems because:
- It helps isolate the object of interest from its surroundings.
- Clarifies the direction and type of all acting forces (like weight, normal force, tension, friction).
- Reduces complex situations to simpler, solvable parts using Newton's Laws.
- Aids in avoiding common mistakes in exam numericals and MCQs.
8. What are common mistakes students make when applying Newton’s Second Law?
Typical mistakes students make with Newton’s Second Law (F = ma) include:
- Misidentifying the net force (sometimes forgetting to include friction or tension)
- Using masses incorrectly in connected systems
- Ignoring vector directions (sign errors)
- Not drawing a proper free body diagram
- Mishandling units or conversion factors
9. Are Laws of Motion questions more conceptual or numerical in JEE?
In JEE Main and Advanced, Laws of Motion questions are a mix of conceptual and numerical types:
- An estimated 40% are pure conceptual (testing understanding of Newton’s Laws, action-reaction, etc.).
- The remaining 60% involve numericals with calculations based on free body diagrams, friction, pulleys, and blocks.
- Both types often appear as MCQs and assertion-reason questions.
10. Where can I download laws of motion important questions in PDF?
You can download laws of motion important questions in PDF from reputable educational platforms and exam prep websites. Look for sources that offer:
- Class 11 Physics important Q&A PDFs
- Previous year solved papers for JEE/NEET
- Free downloadable notes and practice sets aligned with CBSE/NCERT curriculum





