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Motion in a straight line Grade 10 Science lesson 02 Quiz 02

O/LScienceMotion in a straight lineEnglishHard20 questions

Free G.C.E. O/L Science MCQ quiz on Motion in a straight line with 20 questions in English medium. Answer each question, see the correct answer and explanation straight away, and get your score at the end. Use the study section below to review every question and answer.

සාමාන්‍ය පෙළ Science බහුවරණ ප්‍රශ්න නොමිලේ පුහුණු වන්න.

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About this quiz

Master Motion in a Straight Line: Free Online Quiz & MCQ Practice for Grade 10 Science (Lesson 02)Strengthen your understanding of physics fundamentals with this free, interactive online quiz on Motion in a Straight Line (Grade 10 Science, Unit 02). Whether you are revising for unit tests, term exams, or national syllabus assessments, this practice test is designed to sharpen your problem-solving skills, clarify conceptual doubts, and boost your exam confidence.Linear motion is one of the most heavily tested physics topics in secondary school science. This quiz breaks down standard multiple-choice questions (MCQs), covering everything from scalar and vector quantities to motion graph interpretations and equations of motion.Key Topics Covered in This Quiz:Distance vs. Displacement: Differentiating between scalar and vector measurements, reference points, and direction.Speed and Velocity: Calculating uniform speed, average speed, instantaneous velocity, and unit conversions ($m/s$, $km/h$).Acceleration & Deceleration: Understanding positive acceleration, uniform acceleration, and retardation with real-world scenarios.Displacement-Time ($s-t$) Graphs: Reading gradients to find velocity, identifying stationary states, and interpreting uniform motion.Velocity-Time ($v-t$) Graphs: Calculating acceleration from slopes and finding total displacement/distance from the area under the graph.Linear Motion Equations: Solving standard kinematics problems using $v = u + at$, s = ut + 1/2at2, and v2 = u2 + 2as.Key Features & Benefits:Instant Grading & Step-by-Step Solutions: Get your score immediately along with answer keys to learn from your mistakes on the spot.Curriculum-Aligned Questions: Structured according to national and international secondary school science syllabi to reflect real exam question styles.Timed or Untimed Practice: Build mental calculation speed and analytical reasoning under exam conditions.100% Free & Device Friendly: Practice on your mobile, tablet, or PC without mandatory subscriptions or hidden paywalls.Who Should Take This Test?Grade 10 Science students preparing for Lesson 02 classroom assessments and term tests.O/L candidates revising foundational physics modules.Teachers and tutors looking for a digital formative assessment tool for their students.

All questions & answers (20)

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  1. Q1. An object is projected vertically upwards with an initial velocity of 30 m s−1 (taking g = 10 m s−2). How long does it take to reach its maximum height?

    • A)1 s
    • B)2 s
    • C)3 s
    • D)4 s
    Show answer & explanation

    Answer: C) 3 s

    At maximum height, final velocity is 0. Time = initial velocity / g = 30 / 10 = 3 s.

  2. Q2. What is the maximum height reached by the object in question 21?

    • A)15 m
    • B)30 m
    • C)45 m
    • D)90 m
    Show answer & explanation

    Answer: C) 45 m

    Maximum height = area under the v-t graph = (30 × 3) / 2 = 45 m.

  3. Q3. Which instrument in a motor vehicle typically indicates its speed at a particular instant?

    • A)Odometer
    • B)Speedometer
    • C)Altimeter
    • D)Barometer
    Show answer & explanation

    Answer: B) Speedometer

    The speedometer indicates the instant speed of a vehicle.

  4. Q4. If a body moves along a straight line and its displacement does not change with time, what is its velocity?

    • A)Maximum
    • B)Uniform and positive
    • C)Zero
    • D)Infinite
    Show answer & explanation

    Answer: C) Zero

    No change in displacement over time means the body is stationary, so its velocity is zero.

  5. Q5. What type of graph is obtained for an object moving with a non-uniform velocity on a displacement-time graph?

    • A)A straight line parallel to the time axis
    • B)An inclined straight line
    • C)A curve
    • D)A vertical straight line
    Show answer & explanation

    Answer: C) A curve

    Non-uniform velocity results in a changing gradient, which is plotted as a curve on a displacement-time graph.

  6. Q6. On a velocity-time graph, a horizontal straight line parallel to the time axis represents:

    • A)Uniform acceleration
    • B)Constant (uniform) velocity
    • C)Increasing deceleration
    • D)Free fall
    Show answer & explanation

    Answer: B) Constant (uniform) velocity

    A horizontal line on a v-t graph means velocity remains constant over time.

  7. Q7. A body travels 60 m from A to B along a straight line, then walks another 40 m in the same direction to point C. What is the total displacement?

    • A)20 m
    • B)60 m
    • C)100 m
    • D)140 m
    Show answer & explanation

    Answer: C) 100 m

    Displacements in the same direction add up: 60 m + 40 m = 100 m.

  8. Q8. A child walks 60 m from A to B along a straight line, then turns back and walks 40 m towards A. What is the final displacement from the starting point?

    • A)100 m
    • B)40 m
    • C)20 m
    • D)0 m
    Show answer & explanation

    Answer: C) 20 m

    Displacement = 60 m + (-40 m) = 20 m.

  9. Q9. A vehicle travels 100 km from Colombo to Peradeniya in 2 hours. What is its average speed?

    • A)25 km/h
    • B)50 km/h
    • C)100 km/h
    • D)200 km/h
    Show answer & explanation

    Answer: B) 50 km/h

    Average speed = total distance / total time = 100 km / 2 h = 50 km/h.

  10. Q10. Which of the following physical quantities has both magnitude and direction?

    • A)Mass
    • B)Speed
    • C)Distance
    • D)Acceleration
    Show answer & explanation

    Answer: D) Acceleration

    Acceleration is a vector quantity because it involves a change in velocity over time in a specific direction.

  11. Q11. If an object moves at a constant velocity of 2 m s−1, what is its acceleration?

    • A)2 m s−2
    • B)0 m s−2
    • C)9.8 m s−2
    • D)4 m s−2
    Show answer & explanation

    Answer: B) 0 m s−2

    Since velocity is constant, there is no change in velocity, making acceleration zero.

  12. Q12. What is the unit of speed?

    • A)m s−2
    • B)m s−1
    • C)m2 s−1
    • D)kg m s−1
    Show answer & explanation

    Answer: B) m s−1

    Speed is distance divided by time, giving the SI unit meters per second (m s−1).

  13. Q13. When calculating the displacement of an object from a velocity-time graph, what geometric property is used?

    • A)The slope of the line
    • B)The intercept on the y-axis
    • C)The area under the graph
    • D)The perimeter of the graph curve
    Show answer & explanation

    Answer: C) The area under the graph

    The area under a velocity-time graph corresponds to the total displacement.

  14. Q14. An object starting from rest accelerates uniformly to reach 12 m s−1 in 4 s. What is the displacement during these 4 s?

    • A)12 m
    • B)24 m
    • C)48 m
    • D)6 m
    Show answer & explanation

    Answer: B) 24 m

    Displacement = (12 / 2) × 4 = 6 × 4 = 24 m.

  15. Q15. A body moving vertically upwards experiences a gravitational acceleration of:

    • A)+9.8 m s−2
    • B)-9.8 m s−2
    • C)0 m s−2
    • D)+4.9 m s−2
    Show answer & explanation

    Answer: B) -9.8 m s−2

    When moving upwards against gravity, velocity decreases, so gravitational acceleration is taken as negative (-9.8 m s−2).

  16. Q16. Which of the following is NOT a scalar quantity?

    • A)Time
    • B)Mass
    • C)Velocity
    • D)Distance
    Show answer & explanation

    Answer: C) Velocity

    Velocity is a vector quantity, while time, mass, and distance are scalars.

  17. Q17. If an athlete runs 200 m around a curved track and returns exactly to their starting point, what is their total displacement?

    • A)200 m
    • B)400 m
    • C)0 m
    • D)100 m
    Show answer & explanation

    Answer: C) 0 m

    Displacement depends only on the initial and final positions. Since the start and end points are identical, displacement is zero.

  18. Q18. The slope of a displacement-time graph for an object moving with a uniform positive velocity is:

    • A)Zero
    • B)Negative
    • C)Constant and positive
    • D)Constantly increasing
    Show answer & explanation

    Answer: C) Constant and positive

    A straight inclined line on a displacement-time graph indicates a constant, positive velocity (positive slope).

  19. Q19. If a car accelerates from 2 m s−1 to 6 m s−1 in 4 s, what is its acceleration?

    • A)1 m s−2
    • B)2 m s−2
    • C)4 m s−2
    • D)8 m s−2
    Show answer & explanation

    Answer: A) 1 m s−2

    Acceleration = (6 - 2) / 4 = 4 / 4 = 1 m s−2.

  20. Q20. What is the term for the shortest distance between the initial and final points in a particular direction?

    • A)Distance
    • B)Displacement
    • C)Radius
    • D)Path length
    Show answer & explanation

    Answer: B) Displacement

    The magnitude of displacement is defined as the shortest distance between the starting and ending points.

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