Class 11 Physics MCQ Chapter 5 Laws of Motion
Are you searching for Class 11 Physics MCQ Chapter 5 Laws of Motion English Medium? Then you are in the right place. This article provides important multiple-choice questions (MCQs) with answers that will help AHSEC Higher Secondary First Year students prepare effectively for their Physics examinations.
The chapter Laws of Motion is one of the most important chapters in Physics. It explains the relationship between force and motion through Newton’s three laws of motion. Students will learn about inertia, momentum, force, friction, equilibrium of forces, and the applications of Newton’s laws in everyday life. Understanding these concepts is essential for solving numerical problems and studying advanced mechanics.
The MCQs included here are prepared according to the latest AHSEC syllabus and examination pattern. These objective questions are useful for quick revision, concept building, and exam preparation. Regular practice will help students improve their problem-solving skills and gain confidence before examinations.
Whether you are preparing for class tests, annual examinations, or the AHSEC HS First Year Final Examination, these MCQ solutions will help you strengthen your Physics concepts and achieve better academic results.
Part I
Class 11 Physics MCQ Chapter 5 Laws of Motion
VSA & MCQs
I. Very Short Answer (VSA) Questions with Answers
Q. What is force?
Ans: Force is an external agent that changes or tends to change the state of motion of a body.
Q. What is inertia?
Ans: Inertia is the property of a body to resist change in its state of rest or motion.
Q. State Newton’s First Law of Motion.
Ans: A body remains at rest or in uniform straight-line motion unless acted upon by an external force.
Q. What is the SI unit of force?
Ans: Newton (N).
Q. What is momentum?
Ans: Momentum is the product of mass and velocity of a body.
Q. State Newton’s Second Law of Motion.
Ans: The rate of change of momentum is directly proportional to the applied force and occurs in the direction of force.
Q. State Newton’s Third Law of Motion.
Ans: For every action, there is an equal and opposite reaction.
Q. What is friction?
Ans: Friction is the force that opposes relative motion between two surfaces in contact.
Q. What is static friction?
Ans: Friction acting on a body at rest is called static friction.
Q. What is kinetic friction?
Ans: Friction acting on a moving body is called kinetic friction.
Q. What is limiting friction?
Ans: The maximum value of static friction is called limiting friction.
Q. What is impulse?
Ans: Impulse is the product of force and time interval.
Q. What is the equilibrium of forces?
Ans: A body is in equilibrium when the net force acting on it is zero.
Q. What is a free body diagram?
Ans: A diagram showing all external forces acting on a body.
Q. What is centripetal force?
Ans: The force acting towards the centre of a circular path.
Q. What is the weight of a body?
Ans: Weight is the gravitational force acting on a body.
Q. What is a normal reaction?
Ans: The perpendicular force exerted by a surface on a body.
Q. What is tension?
Ans: The pulling force transmitted through a string or rope.
Q. What is the SI unit of momentum?
Ans: kg m/s.
Q. Why do passengers fall backward when a bus starts suddenly?
Ans: Due to inertia of rest.
II. Multiple Choice Questions (MCQs)
Q. Which law is also known as the law of inertia?
(a) Newton’s First Law
(b) Newton’s Second Law
(c) Newton’s Third Law
(d) Law of Gravitation
Ans: (a) Newton’s First Law
Q. The SI unit of force is:
(a) Joule
(b) Newton
(c) Pascal
(d) Watt
Ans: (b) Newton
Q. Momentum is equal to:
(a) Force × Time
(b) Mass × Velocity
(c) Mass × Acceleration
(d) Force × Velocity
Ans: (b) Mass × Velocity
Q. Newton’s Second Law gives the measure of:
(a) Force
(b) Energy
(c) Pressure
(d) Density
Ans: (a) Force
Q. The tendency of a body to resist change in motion is called:
(a) Friction
(b) Momentum
(c) Inertia
(d) Impulse
Ans: (c) Inertia
Q. Action and reaction forces act on:
(a) Same body
(b) Different bodies
(c) Same point
(d) Same direction
Ans: (b) Different bodies
Q. The SI unit of momentum is:
(a) kg m/s
(b) N/m
(c) Joule
(d) Watt
Ans: (a) kg m/s
Q. A passenger falls forward when a moving bus stops suddenly due to:
(a) Inertia of rest
(b) Inertia of motion
(c) Friction
(d) Momentum
Ans: (b) Inertia of motion
Q. Which friction acts when a body is sliding?
(a) Static friction
(b) Limiting friction
(c) Kinetic friction
(d) Rolling friction
Ans: (c) Kinetic friction
Q. Impulse is equal to:
(a) Force × Distance
(b) Force × Time
(c) Mass × Velocity
(d) Mass × Acceleration
Ans: (b) Force × Time
Q. The reaction force is always:
(a) Smaller than action
(b) Larger than action
(c) Equal and opposite to action
(d) Perpendicular to action
Ans: (c) Equal and opposite to action
13. The force acting towards the centre in circular motion is called:
(a) Gravitational force
(b) Centrifugal force
(c) Centripetal force
(d) Frictional force
Ans: (c) Centripetal force
Q. The weight of a body acts:
(a) Upward
(b) Horizontally
(c) Downward
(d) Sideways
Ans: (c) Downward
Q. Friction always acts:
(a) Along motion
(b) Opposite to motion
(c) Upward
(d) Downward
Ans: (b) Opposite to motion
Q. The SI unit of impulse is:
(a) N s
(b) Joule
(c) Watt
(d) Pascal
Ans: (a) N s
Q. A body in equilibrium has:
(a) Maximum force
(b) Zero resultant force
(c) Infinite acceleration
(d) Constant momentum only
Ans: (b) Zero resultant force
Q. Which quantity is a vector?
(a) Mass
(b) Distance
(c) Momentum
(d) Time
Ans: (c) Momentum
Q. Rolling friction is generally:
(a) Greater than sliding friction
(b) Equal to sliding friction
(c) Less than sliding friction
(d) Infinite
Ans: (c) Less than sliding friction
Q. The acceleration produced by a force depends on:
(a) Mass of body
(b) Velocity
(c) Distance
(d) Time only
Ans: (a) Mass of body
Q. A rocket moves upward due to:
(a) Newton’s First Law
(b) Newton’s Second Law
(c) Newton’s Third Law
(d) Friction
Ans: (c) Newton’s Third Law
Q. Which force opposes motion between surfaces?
(a) Magnetic force
(b) Electrostatic force
(c) Frictional force
(d) Nuclear force
Ans: (c) Frictional force
Q. The force exerted by a surface perpendicular to it is called:
(a) Tension
(b) Weight
(c) Normal reaction
(d) Impulse
Ans: (c) Normal reaction
Q. The rate of change of momentum gives:
(a) Velocity
(b) Acceleration
(c) Force
(d) Energy
Ans: (c) Force
Q. When no external force acts on a body, its momentum:
(a) Increases
(b) Decreases
(c) Remains constant
(d) Becomes zero
Ans: (c) Remains constant
Q. A person walking on the ground pushes the ground backward due to:
(a) Newton’s First Law
(b) Newton’s Second Law
(c) Newton’s Third Law
(d) Gravitation
Ans: (c) Newton’s Third Law
Q. Which law explains seat belts in cars?
(a) Newton’s First Law
(b) Newton’s Second Law
(c) Newton’s Third Law
(d) Hooke’s Law
Ans: (a) Newton’s First Law
Q. The force needed to keep a body moving with uniform velocity on a frictionless surface is:
(a) Maximum
(b) Minimum
(c) Zero
(d) Infinite
Ans: (c) Zero
III. Assertion–Reason Type MCQs
Q. Assertion (A): Inertia depends on mass.
Reason (R): The greater the mass, the greater the resistance to change in motion.
(a) Both A and R are true, and R is the correct explanation of A.
(b) Both A and R are true, but R is not the correct explanation of A.
(c) A is true but R is false.
(d) A is false, but R is true.
Ans: (a) Both A and R are true, and R is the correct explanation of A.
Q. Assertion (A): Action and reaction forces cancel each other.
Reason (R): They act on different bodies.
(a) Both A and R are true, and R is the correct explanation of A.
(b) A is false, but R is true.
(c) A is true but R is false.
(d) Both A and R are false.
Ans: (b) A is false, but R is true.
Q. Assertion (A): Friction is necessary for walking.
Reason (R): Friction provides grip between the foot and the ground.
(a) Both A and R are true, and R is the correct explanation of A.
(b) Both A and R are true, but R is not the correct explanation of A.
(c) A is true but R is false.
(d) A is false, but R is true.
Ans: (a) Both A and R are true, and R is the correct explanation of A.
Q. Assertion (A): A body moving with constant velocity has zero net force.
Reason (R): According to Newton’s First Law, balanced forces produce no acceleration.
(a) Both A and R are true, and R is the correct explanation of A.
(b) Both A and R are true, but R is not the correct explanation of A.
(c) A is true but R is false.
(d) A is false, but R is true.
Ans: (a) Both A and R are true, and R is the correct explanation of A.
Q. Assertion (A): Impulse changes momentum.
Reason (R): Impulse is equal to the change in momentum.
(a) Both A and R are true, and R is the correct explanation of A.
(b) Both A and R are true, but R is not the correct explanation of A.
(c) A is true but R is false.
(d) A is false, but R is true.
Ans: (a) Both A and R are true, and R is the correct explanation of A.
Q. Assertion (A): Rolling friction is less than sliding friction.
Reason (R): Rolling reduces surface interlocking.
(a) Both A and R are true, and R is the correct explanation of A.
(b) Both A and R are true, but R is not the correct explanation of A.
(c) A is true but R is false.
(d) A is false, but R is true.
Ans: (a) Both A and R are true, and R is the correct explanation of A.
Q. Assertion (A): A rocket can move in space without air.
Reason (R): Rocket motion is based on Newton’s Third Law.
(a) Both A and R are true, and R is the correct explanation of A.
(b) Both A and R are true, but R is not the correct explanation of A.
(c) A is true but R is false.
(d) A is false, but R is true.
Ans: (a) Both A and R are true, and R is the correct explanation of A.
