Class 11 Physics MCQ Chapter 3 Motion in a Straight Line
Are you searching for Class 11 Physics MCQ Chapter 3 Motion in a Straight Line English Medium? Then this article is the perfect study guide for AHSEC Higher Secondary First Year students. Here, you will find important multiple-choice questions (MCQs) with answers that will help you prepare effectively for your Physics examinations.
The chapter Motion in a Straight Line introduces the basic concepts of kinematics and describes the motion of objects along a single dimension. Students will learn about distance and displacement, speed and velocity, acceleration, graphical representation of motion, and equations of motion. This chapter helps build a strong foundation for understanding more advanced topics in mechanics and physics.
The MCQs provided here are based on the latest AHSEC syllabus and examination pattern. These objective questions are designed to improve conceptual understanding, strengthen problem-solving skills, and help students become familiar with exam-oriented questions. Regular practice can significantly improve accuracy and confidence in Physics.
Whether you are preparing for class tests, annual examinations, or the AHSEC HS First Year Final Examination, these MCQ solutions will help you revise important concepts quickly and score better marks in Physics.
Part I
Motion in a Straight Line
VSA & MCQs
I. Very Short Answer (VSA) Questions with Answers
Q. What is motion?
Ans: Motion is the change in position of an object with time.
Q. What is distance?
Ans: Distance is the total path length travelled by an object.
Q. What is displacement?
Ans: Displacement is the shortest distance between initial and final positions in a specific direction.
Q. What is speed?
Ans: Speed is the distance travelled per unit time.
Q. What is velocity?
Ans: Velocity is displacement per unit time in a specific direction.
Q. What is acceleration?
Ans: Acceleration is the rate of change of velocity with time.
Q. What is retardation?
Ans: Retardation is negative acceleration or decrease of velocity with time.
Q. What is average speed?
Ans: Average speed is the total distance travelled divided by the total time taken.
Q. What is average velocity?
Ans: Average velocity is total displacement divided by total time taken.
Q. What is uniform motion?
Ans: Motion in which equal distances are covered in equal intervals of time.
Q. What is non-uniform motion?
Ans: Motion in which unequal distances are covered in equal intervals of time.
Q. Write the SI unit of velocity.
Ans: metre per second (m/s).
Q. Write the SI unit of acceleration.
Ans: metre per second square (m/s(^2)).
Q. What is a scalar quantity?
Ans: A quantity having only magnitude is called a scalar quantity.
Q. What is a vector quantity?
Ans: A quantity having both magnitude and direction is called a vector quantity.
Q. Is speed a scalar or vector quantity?
Ans: Speed is a scalar quantity.
Q. Is velocity a scalar or vector quantity?
Ans: Velocity is a vector quantity.
Q. What does the slope of the displacement-time graph represent?
Ans: It represents velocity.
Q. What does the slope of the velocity-time graph represent?
Ans: It represents acceleration.
Q. What does the area under a velocity-time graph represent?
Ans: It represents displacement.
Q. What is free fall?
Ans: The motion of a body under the influence of gravity alone is called free fall.
II. Multiple Choice Questions (MCQs)
Q. Which of the following is a vector quantity?
(a) Distance
(b) Speed
(c) Velocity
(d) Time
Ans: (c) Velocity
Q. Displacement can be:
(a) Only positive
(b) Only negative
(c) Positive, negative, or zero
(d) Always zero
Ans: (c) Positive, negative, or zero
Q. The area under the velocity-time graph gives:
(a) Velocity
(b) Acceleration
(c) Displacement
(d) Speed
Ans: (c) Displacement
Q. The slope of the velocity-time graph represents:
(a) Speed
(b) Distance
(c) Acceleration
(d) Momentum
Ans: (c) Acceleration
Q. A body moving with constant velocity has:
(a) Zero acceleration
(b) Infinite acceleration
(c) Negative acceleration
(d) Variable acceleration
Ans: (a) Zero acceleration
Q. Which quantity has both magnitude and direction?
(a) Distance
(b) Time
(c) Speed
(d) Velocity
Ans: (d) Velocity
Q. Retardation is:
(a) Positive acceleration
(b) Negative acceleration
(c) Zero acceleration
(d) Infinite acceleration
Ans: (b) Negative acceleration
Q. If displacement is zero, the distance travelled may be:
(a) Zero only
(b) Negative
(c) Positive
(d) Infinite only
Ans: (c) Positive
Q. The motion of a freely falling body is:
(a) Uniform motion
(b) Accelerated motion
(c) Retarded motion
(d) Circular motion
Ans: (b) Accelerated motion
13. Which graph represents uniform motion?
(a) Curved displacement-time graph
(b) Straight-line displacement-time graph
(c) Zigzag graph
(d) Circular graph
Ans: (b) Straight-line displacement-time graph
Q. Velocity is defined as:
(a) Distance travelled per unit time
(b) Displacement per unit time
(c) Change in acceleration
(d) Change in force
Ans: (b) Displacement per unit time
Q. A body moving with uniform speed may have:
(a) Variable velocity
(b) Constant acceleration
(c) Zero displacement only
(d) Infinite speed
Ans: (a) Variable velocity
Q. The graph between velocity and time for uniform acceleration is:
(a) Straight line
(b) Circle
(c) Curve
(d) Hyperbola
Ans: (a) Straight line
Q. Average velocity is equal to:
(a) Total distance / Total time
(b) Total displacement / Total time
(c) Velocity × Time
(d) Distance × Time
Ans: (b) Total displacement / Total time
Q. When acceleration is opposite to velocity, the body:
(a) Speeds up
(b) Slows down
(c) Remains at rest
(d) Moves uniformly
Ans: (b) Slows down
Q. The motion of a train moving on a straight track is an example of:
(a) Circular motion
(b) Rotational motion
(c) Rectilinear motion
(d) Oscillatory motion
Ans: (c) Rectilinear motion
Q. Which of the following is a scalar?
(a) Acceleration
(b) Displacement
(c) Velocity
(d) Distance
Ans: (d) Distance
Q. If a body covers equal distances in equal intervals of time, the motion is:
(a) Non-uniform
(b) Accelerated
(c) Uniform
(d) Retarded
Ans: (c) Uniform
Q. The velocity-time graph of a body at rest is:
(a) Horizontal line on the time axis
(b) Vertical line
(c) Inclined line
(d) Curve
Ans: (a) Horizontal line on the time axis
Q. The rate of change of displacement is called:
(a) Speed
(b) Velocity
(c) Acceleration
(d) Distance
Ans: (b) Velocity
Q. The motion of an object thrown vertically upward is:
(a) Uniform motion
(b) Accelerated motion
(c) Retarded motion
(d) Circular motion
Ans: (c) Retarded motion
Q. Which quantity cannot be negative?
(a) Velocity
(b) Displacement
(c) Distance
(d) Acceleration
Ans: (c) Distance
Q. A body moving with constant acceleration has:
(a) Constant velocity
(b) Variable velocity
(c) Zero speed
(d) Zero displacement
Ans: (b) Variable velocity
Q. The slope of the displacement-time graph gives:
(a) Distance
(b) Velocity
(c) Acceleration
(d) Momentum
Ans: (b) Velocity
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): Distance can never be negative.
Reason (R): Distance is a scalar quantity representing path length.
(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 acceleration.
Reason (R): Acceleration is the rate of change of velocity.
(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 area under a velocity-time graph gives displacement.
Reason (R): Velocity multiplied by time gives displacement.
(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): Speed and velocity are always equal.
Reason (R): Velocity depends on displacement, while speed depends on distance.
(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 false, but R is true.
(d) A is true but R is false.
Ans: (c) A is false, but R is true.
Q. Assertion (A): A freely falling body moves with constant acceleration.
Reason (R): Acceleration due to gravity remains nearly constant near Earth’s surface.
(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 motion, acceleration is zero.
Reason (R): Velocity remains constant in uniform 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.
