NEET Physics: motion in a straight line Practice Questions
13 free multiple-choice questions on motion in a straight line (Kinematics) for NEET Physics, each with the correct answer and a step-by-step explanation. Attempt a question, then reveal the solution to check your reasoning.
Practice thousands more NEET questions in the app →Q1. What is the difference between distance and displacement?
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Correct answer: C — Distance is the total path length, displacement is the shortest straight-line separation between the initial and final points.
Distance is the total path length traveled by an object, regardless of direction (scalar). Displacement is the shortest straight-line distance between the initial and final positions (vector).
Q2. Speed is a scalar quantity. Which of the following is a vector quantity?
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Correct answer: B — Velocity
Velocity has both magnitude (speed) and direction, making it a vector quantity. Distance and speed are scalars, while displacement is a vector.
Q3. Which quantity is a vector quantity in kinematics?
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Correct answer: A — Acceleration
Vector quantities have both magnitude and direction (e.g., displacement, velocity, acceleration). Distance, speed, and time are scalar quantities (magnitude only).
Q4. A car moves at a constant speed of 20 m/s for 10 seconds. What is the distance covered by the car during this time?
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Correct answer: C — 200 m
For motion at a constant speed, distance is calculated as Distance = Speed × Time. Distance = 20 m/s × 10 s = 200 m.
Q5. The rate of change of velocity is defined as:
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Correct answer: D — Acceleration
Acceleration is the rate of change of velocity. If velocity changes, the object is accelerating.
Q6. If an object is moving with uniform velocity, the distance covered by the object is equal to its displacement. This statement is true for which type of motion?
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Correct answer: A — Motion in a straight line at constant velocity
In motion along a straight line at a constant velocity, the distance covered is the magnitude of the displacement. This is the defining characteristic for uniform motion in a straight line.
Q7. If an object is at the same position in space at two different times, what can be concluded about its displacement?
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Correct answer: D — The displacement is zero
Displacement is the change in position from the initial point to the final point. If the final position equals the initial position, the displacement is zero, regardless of the path taken (distance).
Q8. If an object covers a distance of 100 meters in 10 seconds, what is its average speed?
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Correct answer: A — 5 m/s
Average speed is calculated as total distance divided by the total time. Speed = 100 m / 10 s = 10 m/s.
Q9. What is the physical meaning of the unit of acceleration (m/s²)?
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Correct answer: C — Change in velocity per unit time
Acceleration is the rate of change of velocity. Since velocity is distance/time (m/s), acceleration is (m/s)/s, resulting in m/s².
Q10. If an object moves at a constant velocity, what is its acceleration?
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Correct answer: D — The acceleration is zero.
Acceleration is the rate of change of velocity. If the velocity is constant, the change in velocity is zero, thus the acceleration is zero.
Q11. A particle is initially at position x=10 m and moves to x=30 m. What is the magnitude of the displacement of the particle?
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Correct answer: C — 20 m
Displacement (Δx) is the final position minus the initial position. Δx = x_f - xᵢ = 30 m - 10 m = 20 m. The magnitude of the displacement is 20 m.
Q12. If an object covers a distance of 10 meters in 5 seconds, what is its average speed?
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Correct answer: D — 2 m/s
Average speed is calculated as total distance divided by the total time. Average speed = 10 m / 5 s = 2 m/s.
Q13. Which of the following physical quantities is a vector quantity?
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Correct answer: D — Velocity
Velocity is the rate of change of displacement and has both magnitude and direction, making it a vector. Distance and speed are scalars, and mass is a scalar.
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