NEET (UG) 2026 - Physics: Kinematics (Unit 2) Practice Test 50 MCQs

NEET (UG) 2026 - Physics: Kinematics (Unit 2) Practice Test

Targeted 50 MCQ Practice Module focusing on: Frame of Reference, Motion in a Straight Line, Position-Time Graph, Speed and Velocity, Uniform & Non-Uniform Motion, Average Speed, and Instantaneous Velocity.

Select your answers and click Submit Assessment Answers at the bottom to calculate your total score and review explanations.

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SECTION I: Frame of Reference & Motion in a Straight Line [Questions 1 to 10]

1. A "frame of reference" in mechanics is best defined as:

A fixed point in the universe with zero velocity A body that can never accelerate A coordinate system with a clock, attached to an observer, used to specify the position of an object The center of mass of the Earth

Explanation: A frame of reference is a coordinate system (with an origin and axes) plus a clock, relative to which the position and time of an event are measured.

2. An object is said to be in motion with respect to an observer if:

Its mass changes with time Its position changes with time relative to that observer's frame of reference Its temperature changes with time It possesses potential energy

Explanation: Motion and rest are relative concepts; an object is in motion if its position coordinates change with time relative to a chosen frame of reference.

3. Rest and motion are:

Relative terms, depending on the chosen frame of reference Absolute terms, independent of any observer Applicable only to point objects Defined only for celestial bodies

Explanation: A passenger seated in a moving train is at rest relative to the train but in motion relative to a person standing on the platform, showing rest/motion are relative.

4. Motion of an object confined to a single straight line is called:

Two-dimensional motion Three-dimensional motion Circular motion Rectilinear (one-dimensional) motion

Explanation: When only one coordinate of the object's position changes with time (motion along a straight line), it is called rectilinear or one-dimensional motion.

5. Distance travelled by a moving object is a:

Vector quantity that can be negative Scalar quantity that is always positive or zero Vector quantity with a fixed direction Dimensionless quantity

Explanation: Distance is the total path length covered and, being a scalar, it has magnitude only and cannot be negative.

6. Displacement of an object is defined as:

The total path length covered by the object The speed multiplied by time taken The shortest straight-line vector from the initial to the final position The area under the acceleration-time graph

Explanation: Displacement is a vector quantity representing the change in position, i.e., the straight-line distance and direction from the starting point to the end point.

7. A runner completes one full round of a circular track and returns to the starting point. The magnitude of displacement is:

Zero Equal to the circumference of the track Equal to the diameter of the track Twice the circumference

Explanation: Since the initial and final positions coincide, displacement (change in position) is zero, even though the distance covered equals the full circumference.

8. For motion along a straight line, the magnitude of displacement can be:

Greater than the distance travelled Negative in all cases Independent of the path taken Equal to, but never greater than, the distance travelled

Explanation: Displacement magnitude equals distance only when motion is along a straight line without any reversal of direction; otherwise displacement magnitude is always less than or equal to the distance.

9. Choosing an origin and a positive direction on a number line for one-dimensional motion is important because:

It changes the actual distance travelled by the object It allows position, displacement, velocity, and acceleration to be assigned consistent signs (positive/negative) It is required only for circular motion problems It has no effect on the mathematical description of motion

Explanation: A sign convention (origin + positive direction) lets us represent quantities like position, velocity, and acceleration algebraically with appropriate positive or negative signs.

10. Which of the following is an example of rectilinear motion?

A car moving along a straight highway A stone whirled in a horizontal circle The Earth revolving around the Sun A ball thrown at an angle to the horizontal

Explanation: A car travelling along a straight highway moves along a single line, which is the defining feature of rectilinear (one-dimensional) motion.

SECTION II: Position-Time Graph [Questions 11 to 20]

11. On a position-time (x-t) graph, the slope at any point represents the object's:

Acceleration at that instant Distance travelled up to that instant Velocity at that instant Momentum at that instant

Explanation: The slope of the x-t graph, dx/dt, gives the velocity of the object at that instant.

12. A horizontal straight line parallel to the time axis on an x-t graph indicates that the object is:

Moving with uniform velocity At rest (stationary) Moving with uniform acceleration Moving with continuously increasing speed

Explanation: A horizontal line means the position (x) does not change with time, so the slope (velocity) is zero — the object is at rest.

13. If the x-t graph of an object is an inclined straight line, the object is undergoing:

Non-uniform velocity motion Uniformly accelerated motion Circular motion Uniform velocity (constant speed, constant direction) motion

Explanation: A straight inclined line has a constant slope, meaning velocity does not change with time — this represents uniform velocity motion.

14. A curved (non-linear) x-t graph indicates that the object's:

Velocity is changing with time (non-uniform motion) Velocity is constant Position never changes Acceleration is always zero

Explanation: A curved x-t graph has a slope (velocity) that varies from point to point, indicating non-uniform motion, usually with some acceleration.

15. Between two straight-line segments of an x-t graph, the segment with the steeper slope corresponds to:

Lower speed Higher speed Zero speed Negative distance

Explanation: Since slope of an x-t graph equals speed magnitude (for straight-line motion), a steeper line means the object covers more distance in the same time, i.e., higher speed.

16. A negative slope on an x-t graph shows that the object is:

Accelerating uniformly At rest at the origin Moving in the negative direction (position decreasing with time) Moving faster than light

Explanation: A negative slope means x decreases as t increases, so the object's velocity is negative — it is moving in the negative direction along the chosen axis.

17. If the x-t graph of a particle is a straight line parallel to the time axis passing through the origin's height (x = 0), the particle is:

Permanently at rest at the origin Moving with maximum possible velocity Oscillating rapidly Undergoing uniform acceleration

Explanation: If x = 0 for all time, the particle remains fixed at the origin, i.e., it is permanently at rest there.

18. If the x-t graphs of two objects A and B intersect at a point, this means that at that particular time:

Both objects have zero velocity Both objects have equal acceleration Both objects have travelled equal distances Both objects are at the same position (they meet)

Explanation: An intersection point on the x-t graph means both objects have the same x-coordinate at that instant of time, i.e., they are at the same position.

19. The area enclosed between an x-t graph and the time axis:

Gives the velocity of the object Has no standard physical significance in kinematics Gives the acceleration of the object Gives the total distance travelled

Explanation: Unlike the v-t graph (where area gives displacement), the area under an x-t graph does not correspond to any standard physical quantity used in kinematics.

20. A body starting from rest and moving with uniform acceleration will have an x-t graph that is:

A straight horizontal line A straight line with constant slope through the origin A parabola opening upward, starting from the origin A circle

Explanation: For x = ½at² (starting from rest with uniform acceleration a), the x-t graph is a parabola, since position varies with the square of time.

SECTION III: Speed and Velocity [Questions 21 to 30]

21. Speed is classified as a physical quantity that is:

A scalar, having only magnitude A vector, having magnitude and direction Dimensionless Always constant for any moving body

Explanation: Speed describes only how fast an object moves (magnitude), with no associated direction, making it a scalar quantity.

22. Velocity of an object differs from its speed because velocity:

Is always greater in magnitude than speed Can never be zero Has no SI unit Additionally specifies the direction of motion (it is a vector)

Explanation: Velocity is speed with a specified direction — it is a vector quantity, whereas speed is scalar and direction-independent.

23. Average speed of an object over a time interval is defined as:

Displacement divided by time taken Total distance travelled divided by total time taken Final velocity minus initial velocity The rate of change of velocity

Explanation: Average speed = (total path length / total time elapsed), and since distance is always positive, average speed is always positive or zero.

24. Average velocity of an object over a given time interval is defined as:

Total distance travelled divided by total time taken The square of the average speed Total displacement divided by the total time interval Instantaneous speed at the midpoint of the interval

Explanation: Average velocity = (change in position, i.e., displacement) / (time interval), and it is a vector directed along the net displacement.

25. Which statement about speed and velocity is correct?

Speed can never be negative, but velocity can be negative Both speed and velocity can be negative Speed can be negative, but velocity cannot Neither speed nor velocity can ever be zero

Explanation: Speed, being a scalar magnitude, is always ≥ 0. Velocity, being a vector, can carry a negative sign depending on the chosen direction convention.

26. An object is said to move with uniform velocity if:

Its speed alone remains constant, regardless of direction Its acceleration is increasing steadily It covers unequal displacements in equal time intervals It covers equal displacements, in the same direction, in equal intervals of time

Explanation: Uniform velocity requires both constant magnitude (speed) and constant direction, so equal displacement vectors occur in equal time intervals.

27. A person walks 4 km East and then 4 km West, taking 2 hours in total. Which of the following is correct?

Average velocity = 4 km/h, Average speed = 0 km/h Average velocity = 0 km/h, Average speed = 4 km/h Average velocity and average speed are both 4 km/h Average velocity and average speed are both 0 km/h

Explanation: Net displacement is zero (returns to start), so average velocity = 0. Total distance = 8 km in 2 h, giving average speed = 4 km/h.

28. The velocity of object A relative to object B is given by:

v(AB) = v(A) − v(B) v(AB) = v(A) + v(B) v(AB) = v(A) × v(B) v(AB) = v(B) / v(A)

Explanation: Relative velocity of A with respect to B is defined as the vector difference of their individual velocities: v(AB) = v(A) − v(B).

29. The SI unit of speed as well as velocity is:

km/h m/s² m/s (metre per second) Newton

Explanation: Both speed and velocity have dimensions of [length]/[time], giving the SI unit metre per second (m/s).

30. The speedometer fitted in a vehicle measures:

The average velocity of the vehicle over the entire trip The instantaneous speed of the vehicle The total distance travelled since manufacture The acceleration of the vehicle

Explanation: A speedometer displays the instantaneous speed of the vehicle at each moment, not the average speed or velocity.

SECTION IV: Uniform & Non-Uniform Motion, Average Speed [Questions 31 to 40]

31. An object undergoes uniform motion when it covers:

Equal distances in equal intervals of time, however small the intervals may be Unequal distances in equal intervals of time Equal distances only over very large time intervals Increasing distances with each successive second

Explanation: In uniform motion, the object covers equal distances in equal intervals of time no matter how small the time intervals chosen are.

32. Non-uniform motion is characterized by:

A constant velocity throughout the journey Zero acceleration at every instant Covering unequal distances in equal intervals of time (velocity keeps changing) A straight, uniformly inclined x-t graph

Explanation: In non-uniform motion, the velocity changes with time, so unequal distances are covered in equal time intervals; this generally involves acceleration.

33. A body's velocity is uniform throughout its motion. This implies the body's acceleration is:

Increasing continuously Zero Negative and constant Equal to 9.8 m/s²

Explanation: Since velocity does not change with time in uniform motion, the rate of change of velocity (acceleration) must be zero.

34. Which of the following is an example of non-uniform motion?

A ball falling freely under gravity A train moving at a constant 60 km/h on a straight track Light travelling through vacuum A car moving with constant velocity on a highway

Explanation: A freely falling ball continuously speeds up due to gravitational acceleration, so it covers unequal distances in equal time intervals — non-uniform motion.

35. For a body travelling with uniform (constant) velocity, the instantaneous speed at any point of the journey is:

Always zero Greater than the average speed Less than the average speed Equal to the average speed

Explanation: Since speed does not change during uniform motion, the instantaneous speed at every instant equals the average speed over the whole journey.

36. A body travels the first half of a distance with speed v1 and the second half with speed v2 (equal distances). Its average speed for the whole journey is:

(v1 + v2) / 2 2 v1 v2 / (v1 + v2) v1 v2 (v1 − v2) / 2

Explanation: For equal distances covered at speeds v1 and v2, average speed is the harmonic mean: 2v1v2/(v1+v2).

37. A body travels for the first half of the total time with speed v1 and the second half of the total time with speed v2. Its average speed for the whole journey is:

(v1 + v2) / 2 2 v1 v2 / (v1 + v2) v1 v2 / (v1 + v2) √(v1 v2)

Explanation: When speeds v1 and v2 are maintained for equal time intervals (not equal distances), average speed equals the simple arithmetic mean (v1+v2)/2.

38. A car covers the first 30 km at 30 km/h and the next 30 km at 60 km/h. Its average speed for the entire 60 km journey is:

45 km/h 50 km/h 40 km/h 35 km/h

Explanation: Time1 = 30/30 = 1 h, Time2 = 30/60 = 0.5 h. Total distance = 60 km, total time = 1.5 h. Average speed = 60/1.5 = 40 km/h.

39. In uniform motion along a straight line without any change of direction, the magnitude of average velocity is:

Always less than the average speed Equal to the average speed Always greater than the average speed Independent of the average speed

Explanation: When motion is along a straight line in one fixed direction, distance equals the magnitude of displacement, so average speed equals the magnitude of average velocity.

40. Which of the following statements is correct regarding average speed and average velocity?

Average speed is always less than the magnitude of average velocity Average speed and average velocity are always equal in magnitude Average velocity is always positive Average speed is always greater than or equal to the magnitude of average velocity

Explanation: Since distance travelled ≥ |displacement|, average speed (distance/time) is always greater than or equal to the magnitude of average velocity (|displacement|/time).

SECTION V: Instantaneous Velocity [Questions 41 to 50]

41. Instantaneous velocity of an object at a given instant is mathematically defined as:

Δx multiplied by Δt as Δt → ∞ The total distance divided by total time The limit of Δx/Δt as Δt → 0, i.e., dx/dt The average of initial and final velocities

Explanation: Instantaneous velocity is defined as v = lim(Δt→0) Δx/Δt = dx/dt, the time derivative of position at that instant.

42. The instantaneous speed of an object at any instant is:

Equal to the magnitude of its instantaneous velocity at that instant Always greater than its instantaneous velocity Unrelated to instantaneous velocity Always equal to average speed of the entire trip

Explanation: At any given instant, instantaneous speed is simply the magnitude of the instantaneous velocity vector at that same instant.

43. Graphically, the instantaneous velocity of an object at a point on its x-t graph is given by:

The slope of the line joining the origin to that point The slope of the tangent drawn to the curve at that point The area under the curve up to that point The y-intercept of the curve

Explanation: Since instantaneous velocity is dx/dt, it corresponds graphically to the slope of the tangent to the x-t curve at that particular point.

44. At the instant a ball thrown vertically upward reaches its maximum height, its instantaneous velocity is:

Maximum and directed upward Maximum and directed downward Equal to the initial velocity Zero, momentarily

Explanation: At the highest point of vertical projectile motion, the velocity momentarily becomes zero before the object begins descending under gravity.

45. For an object moving with uniform velocity, the instantaneous velocity at any point during the journey is:

The same (constant) at every instant, equal to the uniform velocity Different at every instant Zero throughout the motion Undefined

Explanation: In uniform velocity motion, velocity does not change with time, so the instantaneous velocity is the same constant value at every instant.

46. The position of a particle moving along the x-axis is given by x = t² (x in metres, t in seconds). Its instantaneous velocity at t = 2 s is:

2 m/s 8 m/s 4 m/s 1 m/s

Explanation: v = dx/dt = 2t. At t = 2 s, v = 2 × 2 = 4 m/s.

47. The position of a particle is given by x = 5t + 3t² (x in metres, t in seconds). Its instantaneous velocity at t = 1 s is:

5 m/s 6 m/s 8 m/s 11 m/s

Explanation: v = dx/dt = 5 + 6t. At t = 1 s, v = 5 + 6(1) = 11 m/s.

48. The direction of the instantaneous velocity vector of a particle moving along a curved path is:

Always perpendicular to the path at that point Always tangential to the path at that point Always directed towards the center of the path Always along the x-axis regardless of the path

Explanation: The instantaneous velocity is directed along the tangent to the particle's trajectory at that particular point, in the direction of motion.

49. If the average velocity of an object over a very small time interval Δt (as Δt → 0) is computed, this quantity approaches the object's:

Instantaneous velocity at that instant Average speed over the entire journey Total displacement Acceleration at that instant

Explanation: As the time interval Δt shrinks toward zero, the average velocity over that interval converges to the instantaneous velocity at that specific instant.

50. For a particle undergoing non-uniform motion, the instantaneous velocity at the midpoint (in time) of a journey is, in general:

Always exactly equal to the average velocity of the whole journey Always zero Not necessarily equal to the average velocity of the whole journey Always double the average velocity

Explanation: Since velocity varies continuously in non-uniform motion, the instantaneous velocity at the time-midpoint need not coincide with the average velocity calculated over the whole interval.

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