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Understanding the laws of motion is a crucial part of Class 11 Physics, especially in mastering concepts related to force and motion. This topic, encapsulating Newton’s three laws, lays the foundation for various real-world applications of physics. As one of the most important chapters in the Class 11 Physics curriculum, practicing Laws of Motion MCQs Class 11 Physics helps students reinforce their understanding of concepts like inertia, acceleration, and the relationship between force and motion. These MCQs also test knowledge on key topics such as Newton’s first, second, and third laws.
Whether you’re preparing for exams or simply looking to enhance your understanding, Laws of Motion Class 11 MCQs with answers provide an excellent opportunity to practice and clarify your concepts. MCQ on Laws of Motion Class 11 PDF download offers a convenient way to access a variety of questions and solutions for quick revision. These questions cover everything from basic principles to complex problems, ensuring thorough preparation for exams.
Class 11 Physics Chapter 5 MCQs challenge students to apply their knowledge of Newton’s Laws to solve real-life physics problems. Practicing Laws of Motion MCQs Class 11 with answers not only helps in mastering theoretical concepts but also sharpens problem-solving skills for competitive exams. Whether it’s Newton’s Laws of Motion MCQs Class 11 or Class 11 Physics MCQs on Laws of Motion, these quizzes are designed to test and improve your physics skills efficiently.
Class 11 Physics Laws of Motion Overview
The Laws of Motion, introduced by Sir Isaac Newton, form the foundation of classical mechanics and describe the relationship between the motion of an object and the forces acting upon it. These laws are essential in understanding how objects move and interact in our physical world.
Newton’s First Law (Law of Inertia)
This law states that an object will remain at rest or continue to move with uniform velocity unless acted upon by an external force. It highlights the property of inertia, which resists changes in the state of motion.
Newton’s Second Law
This law provides the quantitative relationship between force, mass, and acceleration. It is expressed as:
F=ma
where 𝐹 is the net force, m is the mass of the object, and a is the acceleration produced. This law explains how the force applied to an object affects its motion.
Newton’s Third Law
This law states that for every action, there is an equal and opposite reaction. When one object exerts a force on another, the second object exerts an equal force in the opposite direction. This principle explains interactions like propulsion and recoil.
Free Body Diagrams
Free body diagrams are a crucial tool to analyze forces acting on an object. By representing the object as a point and the forces as vectors, problems involving multiple forces become easier to solve.
Friction
Friction is a force that opposes the relative motion between two surfaces in contact. It can be categorized as static friction (before motion starts) and kinetic friction (during motion). Understanding friction is important for solving practical problems in mechanics.
Circular Motion
Circular motion involves objects moving in a curved path under the influence of centripetal force, directed toward the center of the path. The study of circular motion builds upon Newton’s laws to explain phenomena like planetary orbits and car turns.
Class 11 Physics Laws of Motion MCQ with Answers
Question 1. What is the net force of a kite held stationary in the sky?
Options:
a) 1
b) Increasing
c) 0
d) Decreasing
Answer: c) 0
Explanation:
The net force on the kite is zero because it is stationary, meaning all forces acting on it are balanced.
Question 2. Which branch of physics studies the motion of a body while considering the cause?
Options:
a) Statics
b) Thermodynamics
c) Dynamics
d) Astronomy
Answer: c) Dynamics
Explanation:
Dynamics is the branch of physics that examines the motion of objects and the forces causing this motion.
Question 3. What is the formula to find linear momentum?
Options:
a) Linear momentum = 2(Mass + Velocity)
b) Linear momentum = Mass / Velocity
c) Linear momentum = Mass * Velocity
d) Linear momentum = Mass – Velocity
Answer: c) Linear momentum = Mass * Velocity
Explanation:
Linear momentum is calculated as the product of an object’s mass and its velocity.
Question 4. What are the types of inertia?
Options:
a) Inertia of rest
b) Inertia of motion
c) Inertia of direction
d) All the above options
Answer: d) All the above options
Explanation:
Inertia can be classified into three types: the inertia of rest, the inertia of motion, and the inertia of direction.
Question 5. What happens to the total momentum of a system when no external force is applied?
Options:
a) Becomes zero
b) Remains constant
c) Increases gradually
d) Decreases gradually
Answer: b) Remains constant
Explanation:
The total momentum of an isolated system is conserved, meaning it remains constant if no external force acts on it.
More Resources for Class 11
- NCERT Solutions for Class 11 Chemistry
- NCERT Solutions for Class 11 Physics
- NCERT Solutions for Class 11 Biology
- NCERT Solutions for Class 11 Maths
Question 6. When does the apparent weight of a body equal its actual weight?
Options:
a) When it moves with increasing velocity
b) When it remains at rest
c) When it moves with uniform motion
d) Both b) and c)
Answer: d) Both b) and c)
Explanation:
The apparent weight is equal to the actual weight when the body is at rest or in uniform motion because there is no acceleration.
Question 7. What are forces called that act for a very short time?
Options:
a) Short force
b) Interval force
c) Impulsive forces
d) Interrupting force
Answer: c) Impulsive forces
Explanation:
Impulsive forces act on a body for a very short duration, causing a sudden change in momentum.
Question 8. An aircraft performs a horizontal loop at 720 km/h with its wings banked at 15°. What is the radius of the loop?
Options:
a) 15 km
b) 23.567 m
c) 12.781 m
d) 14 km
Answer: a) 15 km
Explanation:
Using the formula
tanθ = v2/rg‘ where θ is the banking angle, v is the speed, r is the radius, and g is gravity, substituting the values gives a radius of 15 km.
Question 9. What is the property that resists a change in a body’s motion called?
Options:
a) Force
b) Momentum
c) Inertia
d) Acceleration
Answer: c) Inertia
Explanation:
Inertia is the natural property of a body that resists changes in its state of rest or motion.
Question 10. What is 1 Newton equal to?
Options:
a) 1 Newton = 1 kg x 1 m/s²
b) 1 Newton = 1 kg
c) 1 Newton = 1 kg x 1 m/s
d) 1 Newton = m/s²
Answer: a) 1 Newton = 1 kg x 1 m/s²
Explanation:
One Newton is the force required to accelerate a 1 kg mass by 1 m/s².
Get NCERT Solutions for Class 11 Physics All Chapters
- Chapter 1: Physical World
- Chapter 2: Units and Measurements
- Chapter 3: Motion in a Straight Line
- Chapter 4: Motion in a Plane
- Chapter 5: Laws of Motion
- Chapter 6: Work, Energy, and Power
- Chapter 7: System of Particles and Rotational Motion
- Chapter 8: Gravitation
- Chapter 9: Mechanical Properties of Solids
- Chapter 10: Mechanical Properties of Fluids
- Chapter 11: Thermal Properties of Matter
- Chapter 12: Thermodynamics
- Chapter 13: Kinetic Theory
- Chapter 14: Oscillations
- Chapter 15: Waves
FAQs on Laws of Motion MCQ Class 11 Physics
What topics are covered in Laws of Motion for Class 11 Physics?
The chapter covers Newton's three laws of motion, free body diagrams, friction, circular motion, and the application of forces in various scenarios.
How can I prepare effectively for MCQs on Laws of Motion?
Focus on understanding concepts like inertia, force, and friction. Practice problems, draw free body diagrams, and revise formulas to strengthen your basics.
Are numerical problems included in Laws of Motion MCQs?
Yes, numerical problems based on force, acceleration, friction, and circular motion often appear in MCQs. Practice solving them with accurate calculations.
Why are free body diagrams important in solving MCQs?
Free body diagrams help visualize and analyze forces acting on an object, making it easier to solve complex MCQ problems.
Where can I find additional resources for Laws of Motion MCQs?
You can refer to NCERT textbooks, practice MCQs from reference books, and explore online resources for mock tests and quizzes.
