NEET UG – Physics Practice Paper – Mechanics – (Part 4) with Solutions
Total Questions: 30 | +4 Marks for Correct Answer | No Negative Marking 1. The unit of force is: Newton Joule Watt Pascal 2. Newton’s Second Law is: F = ma F = mv F = m/v F = ma² 3. Momentum is: mv m/v v/m mv² 4. Unit of work is: Joule Newton Watt Volt 5. Work done is zero when angle is: 90° 0° 180° 45° 6. Kinetic energy formula: ½mv² mv mgh m²v 7. Potential energy formula: mgh mv² mv m²g 8. Power is: Work/time Work×time Time/work Work² 9. Unit of power: Watt Joule Newton Volt 10. Acceleration unit: m/s² m/s m²/s m²/s² 11. Velocity is: Vector Scalar Constant None 12. Speed is: Scalar Vector Both None 13. Work = Fd cosθ Fd F/d F²d 14. Momentum unit: kg·m/s kg·m²/s N J 15. Impulse = Ft F/t t/F F²t 16. Work-energy theorem: W = change in KE W = KE W = PE W = Force 17. Force unit: Newton Joule Watt Volt 18. Time unit: Second Minute Hour Day 19. Distance unit: Meter Joule Watt Newton 20. Acceleration = change in velocity/time velocity/time distance/time none 21. Velocity = displacement/time distance/time acceleration/time none 22. Speed = distance/time displacement/time acceleration/time none 23. SI unit of mass: kg gram tonne pound 24. SI unit of length: meter cm km inch 25. SI unit of time: second minute hour day 26. Acceleration due to gravity is: 9.8 m/s² 10 m/s 8 m/s² 9.8 m/s 27. Unit of energy: Joule Watt Newton Volt 28. Power depends on: Work & time Work only Time only None 29. Work depends on: Force, distance, angle Force only Distance only None 30. Energy is: Capacity to do work Force Power Velocity Submit Answers Detailed Notes for NEET UG Physics Practice Paper (Mechanics – Part 4) The fourth part of this NEET Physics practice series focuses entirely on Mechanics, which is one of the most important and high-weightage topics in the NEET syllabus. Mechanics forms the foundation of Physics and plays a critical role not only in direct questions but also in solving problems from other chapters like waves, thermodynamics, and modern physics. A strong grasp of mechanics ensures that students can tackle a wide variety of questions with confidence and accuracy. Fundamental Physical Quantities and Units The quiz begins by reinforcing the understanding of basic physical quantities and their SI units, such as force (Newton), work (Joule), power (Watt), distance (meter), time (second), and mass (kilogram). These are the building blocks of physics. Understanding units is crucial because: For example, force is measured in Newton and is defined as:F=maF = maF=ma This immediately connects the unit of force with mass and acceleration. Newton’s Laws of Motion Newton’s laws are central to mechanics and are directly tested in this quiz. The second law is especially important because it provides a quantitative relationship between force, mass, and acceleration. Many NEET problems are based on this fundamental equation. Momentum and Impulse Momentum is defined as:p=mvp = mvp=mv It depends on both mass and velocity, making it a vector quantity. The unit of momentum is kg⋅m/skg·m/skg⋅m/s. Impulse is defined as:Impulse=F×tImpulse = F \times tImpulse=F×t It represents the change in momentum. Understanding impulse is important for collision problems, which are frequently asked in NEET. Work and Energy Concepts The concept of work is introduced through the formula:W=FdcosθW = Fd \cos\thetaW=Fdcosθ This shows that work depends on: A key concept tested in the quiz is that work is zero when the angle is 90°, because cos90°=0\cos 90° = 0cos90°=0. Energy is defined as the capacity to do work, and its SI unit is Joule. There are two main types of energy covered: Students must understand that kinetic energy depends on the square of velocity, while potential energy depends on height. Work-Energy Theorem One of the most important principles in mechanics is the work-energy theorem, which states:W=ΔKEW = \Delta KEW=ΔKE This means that the work done on an object results in a change in its kinetic energy. This concept is widely used in solving NEET problems involving motion. Power and Its Applications Power is defined as the rate of doing work:P=WtP = \frac{W}{t}P=tW Its SI unit is Watt. Power depends on both the amount of work done and the time taken to do it. Understanding power is important for questions involving machines, engines, and energy transfer. Kinematics: Motion and Its Description Basic kinematics concepts are reinforced in this quiz through formulas like: Students must clearly understand the difference between: This distinction is frequently tested in NEET. Scalars vs Vectors The quiz emphasizes the difference between scalar and vector quantities. Understanding this difference is essential because vector quantities require direction as well as magnitude, which affects how they are calculated. Gravitational Concepts The value of acceleration due to gravity (g≈9.8m/s2g ≈ 9.8 m/s^2g≈9.8m/s2) is an important constant that students must remember. This concept is used in: Students should also understand that gravity acts downward and affects all objects equally regardless of mass (in ideal conditions). Importance of Formula Clarity Mechanics relies heavily on formulas, and students must be comfortable using them correctly. Important formulas include: However, simply memorizing formulas is not enough. Students must understand the conditions under which each formula applies. Concept Integration One of the key benefits of this quiz is that it integrates multiple concepts. For example: This reflects the actual NEET exam pattern, where questions are often multi-conceptual. Common Mistakes to Avoid Students should be careful about: Avoiding these mistakes can significantly improve performance. Exam Strategy for Mechanics To score well in mechanics, students should: Mechanics questions are often straightforward but require quick thinking and accuracy. Learning Outcomes from This Quiz By practicing this set, students will: These outcomes are essential for achieving a high score in NEET Physics. Final Conclusion Mechanics is the backbone of Physics, and mastering it is essential for success in NEET. This practice paper reinforces the idea that strong fundamentals lead to better problem-solving skills. The concepts covered—force, motion, work, energy, power, and









