Class 11 Physics MCQ Chapter 4 Motion in a Plane
Looking for Class 11 Physics MCQ Chapter 4 Motion in a Plane English Medium? This article is a useful study resource for AHSEC Higher Secondary First Year students who want to practice important multiple-choice questions and improve their understanding of Physics concepts.
The chapter Motion in a Plane extends the study of motion from one dimension to two dimensions. Students will learn about scalar and vector quantities, vector addition and subtraction, resolution of vectors, projectile motion, and uniform circular motion. These concepts are essential for understanding the motion of objects in real-life situations and form the basis for many advanced topics in mechanics.
The MCQs included here are prepared according to the latest AHSEC syllabus and examination pattern. They help students revise important topics, strengthen conceptual knowledge, and develop problem-solving skills. Practicing these objective questions regularly can improve accuracy and boost 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 revise the chapter effectively and achieve better results in Physics.
Part I
Class 11 Physics MCQ Chapter 4 Motion in a Plane
VSA & MCQs
I. Very Short Answer (VSA) Questions with Answers
Q. What is motion in a plane?
Ans: Motion taking place in two dimensions is called motion in a plane.
Q. What is a scalar quantity?
Ans: A scalar quantity has only magnitude.
Q. What is a vector quantity?
Ans: A vector quantity has both magnitude and direction.
Q. Give one example of a vector quantity.
Ans: Velocity.
Q. What is the SI unit of displacement?
Ans: metre (m).
Q. What is the SI unit of acceleration?
Ans: metre per second square (m/s(^2)).
Q. What is meant by resultant vector?
Ans: The single vector obtained by combining two or more vectors.
Q. What is vector addition?
Ans: The process of finding the resultant of two or more vectors.
Q. State the triangle law of vector addition.
Ans: If two vectors are represented by two sides of a triangle taken in order, the third side represents the resultant vector.
Q. State the parallelogram law of vector addition.
Ans: If two vectors are represented by adjacent sides of a parallelogram, the diagonal represents the resultant vector.
Q. What is projectile motion?
Ans: The motion of a body projected into air under gravity.
Q. What is the path of projectile motion called?
Ans: Parabola.
Q. What is the angle of projection?
Ans: The angle between the initial velocity and horizontal direction.
Q. What is the horizontal component of velocity?
Ans: The component of velocity along the horizontal direction.
Q. What is the vertical component of velocity?
Ans: The component of velocity along the vertical direction.
Q. What is uniform circular motion?
Ans: Motion of an object in a circular path with constant speed.
Q. What is centripetal acceleration?
Ans: Acceleration directed towards the centre of the circular path.
19. What is the SI unit of angular displacement?
Ans: radian.
Q. What is angular velocity?
Ans: Rate of change of angular displacement with time.
Q. What is the maximum height in projectile motion?
Ans: The greatest vertical distance reached by the projectile.
Q. What is the range of a projectile?
Ans: The horizontal distance travelled by the projectile.
Q. What is the resolution of vectors?
Ans: The process of splitting a vector into components along different directions.
III. Multiple Choice Questions (MCQs)
Q. Which of the following is a vector quantity?
(a) Speed
(b) Distance
(c) Velocity
(d) Time
Ans: (c) Velocity
Q. The SI unit of angular displacement is:
(a) Degree
(b) Radian
(c) Metre
(d) Second
Ans: (b) Radian
Q. The path followed by a projectile is:
(a) Circular
(b) Straight line
(c) Elliptical
(d) Parabolic
Ans: (d) Parabolic
Q. The horizontal velocity of a projectile remains:
(a) Increasing
(b) Decreasing
(c) Constant
(d) Zero
Ans: (c) Constant
Q. The acceleration acting on a projectile is:
(a) Zero
(b) (g) downward
(c) (g) upward
(d) Variable
Ans: (b) (g) downward
Q. Which law is used for vector addition?
(a) Newton’s law
(b) Ohm’s law
(c) Triangle law
(d) Boyle’s law
Ans: (c) Triangle law
Q. In uniform circular motion, speed remains:
(a) Variable
(b) Zero
(c) Constant
(d) Infinite
Ans: (c) Constant
Q. The direction of centripetal acceleration is:
(a) Away from centre
(b) Tangential to path
(c) Towards centre
(d) Upward
Ans: (c) Towards centre
Q. The resultant of two equal vectors acting in opposite directions is:
(a) Maximum
(b) Zero
(c) Double
(d) Half
Ans: (b) Zero
Q. Which quantity remains constant in projectile motion?
(a) Vertical velocity
(b) Horizontal velocity
(c) Acceleration due to gravity changes
(d) Direction of motion
Ans: (b) Horizontal velocity
Q. Which of the following is not a vector quantity?
(a) Force
(b) Velocity
(c) Speed
(d) Displacement
Ans: (c) Speed
Q. The motion of the Earth around the Sun is approximately:
(a) Linear motion
(b) Circular motion
(c) Oscillatory motion
(d) Random motion
Ans: (b) Circular motion
Q. If two vectors are perpendicular, the resultant is found using:
(a) Addition law
(b) Pythagoras theorem
(c) Newton’s law
(d) Hooke’s law
Ans: (b) Pythagoras theorem
Q. The vertical component of projectile velocity changes due to:
(a) Gravity
(b) Friction
(c) Mass
(d) Density
Ans: (a) Gravity
Q. The direction of velocity in circular motion is:
(a) Towards centre
(b) Away from centre
(c) Tangential to path
(d) Vertical
Ans: (c) Tangential to path
Q. Which quantity is dimensionless?
(a) Angular displacement
(b) Velocity
(c) Acceleration
(d) Force
Ans: (a) Angular displacement
Q. The magnitude of the resultant of two parallel vectors acting in same direction is:
(a) Difference of magnitudes
(b) Product of magnitudes
(c) Sum of magnitudes
(d) Zero
Ans: (c) Sum of magnitudes
Q. Which graph represents projectile motion?
(a) Straight line
(b) Circle
(c) Parabola
(d) Hyperbola
Ans: (c) Parabola
Q. Centripetal force acts:
(a) Outward
(b) Towards centre
(c) Upward
(d) Downward
Ans: (b) Towards centre
Q. The velocity of a projectile at the highest point is:
(a) Zero
(b) Only vertical component
(c) Only the horizontal component
(d) Infinite
Ans: (c) Only horizontal component
Q. The angle between the resultant and the components depends on:
(a) Magnitudes of vectors
(b) Mass
(c) Density
(d) Temperature
Ans: (a) Magnitudes of vectors
Q. Which one is an example of projectile motion?
(a) Rotating fan
(b) Falling apple
(c) Ball thrown in air
(d) Moving train
Ans: (c) Ball thrown in air
Q. The time period of circular motion is the time taken to complete:
(a) Half revolution
(b) One revolution
(c) Two revolutions
(d) Quarter revolution
Ans: (b) One revolution
Q. The acceleration in uniform circular motion is called:
(a) Tangential acceleration
(b) Gravitational acceleration
(c) Centripetal acceleration
(d) Linear acceleration
Ans: (c) Centripetal acceleration
III. Assertion–Reason Type MCQs
Q. Assertion (A): Velocity is a vector quantity.
Reason (R): Velocity has both magnitude and direction.
(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): The path of a projectile is parabolic.
Reason (R): Horizontal velocity remains constant while vertical velocity changes.
(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): In uniform circular motion, velocity remains constant.
Reason (R): The direction of velocity changes continuously.
(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): Centripetal acceleration acts towards the centre.
Reason (R): Circular motion requires continuous change in direction.
(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): Angular displacement is a dimensionless quantity.
Reason (R): Angular displacement is measured in radians.
(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: (b) Both A and R are true but R is not the correct explanation of A.
Q. Assertion (A): Two equal opposite vectors give zero resultant.
Reason (R): Their magnitudes are equal and directions are opposite.
(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.
