NEET Physics: Uniform and non-uniform motion Practice Questions
14 free multiple-choice questions on Uniform and non-uniform motion (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. The distance traveled by a particle is 100 m. If the particle returns to its starting point, what is its displacement?
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Correct answer: B — 0 m
Displacement is the shortest straight-line distance between the initial and final positions. If the particle returns to its starting point, the final position is the same as the initial position, so displacement is zero.
Q2. Displacement is a vector quantity. If an object moves 5 m in the positive direction and then 3 m in the negative direction, what is the total displacement?
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Correct answer: A — +2 m
Displacement is the change in position. Moving 5 m forward (+5) and then 3 m backward (-3) results in a net displacement of 5 - 3 = 2 m in the positive direction.
Q3. Average speed is calculated by dividing the total distance traveled by the total time taken. What is the SI unit for average speed?
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Correct answer: C — m/s
Speed is the rate of change of distance with respect to time. The SI unit for speed is meters per second (m/s).
Q4. An object covers a distance of 100 m in 10 s. If the motion is uniform, what is its average speed?
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Correct answer: B — 5 m/s
Average speed is calculated as total distance divided by the total time: Average Speed = 100 m / 10 s = 10 m/s.
Q5. When an object moves with non-uniform velocity, what does it imply about its acceleration?
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Correct answer: C — The acceleration is generally non-zero and may change in magnitude and direction.
Non-uniform motion implies that the velocity is changing over time. The rate of change of velocity is acceleration. If the velocity is changing, the acceleration is non-zero, and it can be positive, negative, or zero (if the magnitude is changing but the direction is constant).
Q6. Which of the following statements correctly describes uniform motion?
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Correct answer: D — The object covers equal distances in equal intervals of time.
Uniform motion implies constant velocity, meaning the object covers equal distances in equal intervals of time. Option B is incorrect as constant velocity implies zero acceleration.
Q7. A car travels a distance of 100 meters in 10 seconds at a constant speed. What is the magnitude of its average velocity?
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Correct answer: A — 10 m/s
Average velocity is total displacement divided by total time. Assuming motion along a straight line, the average velocity is 100 m / 10 s = 10 m/s.
Q8. Which of the following quantities is a vector quantity?
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Correct answer: B — Acceleration
Acceleration has both magnitude and direction, making it a vector. Distance, speed, and time are scalar quantities.
Q9. A car travels a distance of 100 km in 2 hours at a constant speed. What is the average speed of the car during this journey?
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Correct answer: D — 50 km/h
Average speed is defined as total distance divided by total time. Average speed = 100 km / 2 h = 50 km/h.
Q10. A stone is dropped from a height of 490 m under gravity (acceleration due to gravity g = 9.8 m/s²). What is its initial velocity just before it starts falling?
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Correct answer: A — 0 m/s
Since the stone is 'dropped', its initial velocity (u) just before motion starts is 0 m/s. This is a conceptual recall based on the definition of 'dropped'.
Q11. If an object starts from rest and moves with constant positive acceleration, its velocity at time t is proportional to:
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Correct answer: D — t
For constant acceleration starting from rest (u=0), the kinematic equation for velocity is v = u + at. Since u=0, v = at, which is proportional to t.
Q12. When an object moves with non-uniform acceleration, its velocity:
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Correct answer: A — Changes in magnitude or direction
Non-uniform acceleration means the velocity is changing, which implies either its magnitude or its direction (or both) is changing.
Q13. If the velocity-time graph for an object is a horizontal line, what can be concluded about the motion of the object?
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Correct answer: D — The object is moving with uniform velocity.
A horizontal line on a velocity-time graph indicates that the velocity is constant, which means the object is moving with uniform velocity.
Q14. Average velocity is defined as the total displacement divided by the total time taken. If a car travels 100 meters in 10 seconds, what is its average velocity?
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Correct answer: B — 10 m/s
Average velocity is calculated as total displacement divided by the total time taken. Average velocity = Displacement/Time = (100 m)/(10 s) = 10 m/s.
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