Free Displacement and Velocity MCQs with Answers
86 Displacement and Velocity MCQs from Physics, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
Displacement is the directed change in position, while velocity is the rate of change of displacement and includes both magnitude and direction. The topic connects position-time and velocity-time graphs with average and instantaneous values, and distinguishes displacement from distance and velocity from speed.
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- A. Speed
- B. Distance
- C. Displacement
- D. Time
Explanation: Displacement has both magnitude and direction, whereas distance records only how far was travelled with no direction attached.
Correct answer: Displacement- A. acceleration
- B. displacement
- C. force
- D. momentum
Explanation: Multiplying velocity by time gives displacement, so the area enclosed between the curve and the time axis is the displacement travelled.
Correct answer: displacement- A. is a vector and displacement is a scalar
- B. is the total path length travelled, while displacement is the straight line change in position
- C. is always smaller than displacement
- D. is measured in different units
Explanation: Walking once round a circular track leaves the displacement at zero while the distance equals the circumference, so distance can exceed…
Correct answer: is the total path length travelled, while displacement is the straight line change in position- A. LT
- B. LMT
- C. LMT^-1
- D. LT^-1
Explanation: Velocity is displacement divided by time, so its dimensions are length/time, written LT^-1.
Correct answer: LT^-1- A. Displacement
- B. Force
- C. Acceleration
- D. Momentum
Explanation: The area under a velocity-time graph is velocity multiplied by time, giving displacement, with unit metre (m).
Correct answer: Displacement- A. Equal to one
- B. Less than one
- C. Greater than one
- D. All are possible
Explanation: The magnitude of displacement can never exceed the distance travelled, so displacement/distance is always at most 1.
Correct answer: Greater than one- A. Zero
- B. Positive
- C. Negative
- D. None
Explanation: Speed is the magnitude of velocity, so it can be zero or positive but cannot be negative; its SI unit is m/s.
Correct answer: Negative- A. 45 m/s
- B. 90 m/s
- C. 100 m/s
- D. 120 m/s
Explanation: Convert miles per hour using 1 mile = 1609.344 m and 1 hour = 3600 s: 100 mph = 100 × 1609.344 m / 3600 s = 44.704 m/s, which rounds to 45…
Correct answer: 45 m/s- A. 0.001mm
- B. 0.01mm
- C. 0.1mm
- D. 0.0001mm
Explanation: For the usual vernier caliper, 10 vernier divisions equal 9 main-scale divisions, so with 1 main-scale division = 1 mm, the least count is…
Correct answer: 0.1mm- A. Time
- B. Density
- C. Volume
- D. Area
Explanation: Time is a fundamental SI quantity, so it is not formed from combinations of other base quantities.
Correct answer: Time- A. πR
- B. 2πR
- C. 0
- D. 4πR
Explanation: After two complete revolutions, the body returns to its starting point, so its displacement is 0 m.
Correct answer: 0- A. πR
- B. 2π R
- C. 0
- D. 4πR
Explanation: After two complete revolutions, the body returns to its starting point, so its displacement is 0 m.
Correct answer: 0- A. Elliptical path
- B. Circular path
- C. Parabolic path
- D. Rectilinear path
Explanation: Constant velocity requires both constant speed and constant direction. A rectilinear path keeps the direction unchanged, whereas circular…
Correct answer: Rectilinear path- A. 1mm
- B. 10km
- C. 1000um
- D. Both A and B
Explanation: The prefix micro means 10^-6 and its proper SI symbol is μ, so the standard representation is 1000 μm, not 1000 um.
Correct answer: 1000um- A. 76.8
- B. 77
- C. 76.9
- D. None of these
Explanation: To round 76.85 to two significant figures, retain 7 and 6 and inspect the next digit, 8.
Correct answer: 77- A. Highly precise instrument
- B. Conduct at room temperature
- C. Count number of vibration
- D. Both a and C
Explanation: If the time for one vibration is uncertain by an amount Δt, timing many vibrations gives a total time of NΔt, while the fractional…
Correct answer: Both a and C- A. 3
- B. 5
- C. 2
- D. None
Explanation: In 5.400, the two zeros after the decimal point are significant because they show measured precision, so the number has 4 significant…
Correct answer: None- A. Percentage uncertainties are added
- B. Absolute uncertainties are added
- C. Percentage uncertainties are divided
- D. Absolute uncertainties are divided
Explanation: For multiplication or division, fractional uncertainties combine, so percentage uncertainties are added.
Correct answer: Percentage uncertainties are added- A. Random error
- B. Personal error
- C. Systematic error
- D. Classified error
Explanation: Zero error produces a consistent offset in every reading, so it is a systematic error rather than a random fluctuation.
Correct answer: Systematic error- A. f=vt
- B. S=Vit+1/2at2
- C. V=St
- D. V=f/t
Explanation: In S = Vit + 1/2at², Vit has dimensions (m s-1)(s) = m and at² has dimensions (m s-2)(s²) = m, so every term has the dimension of…
Correct answer: S=Vit+1/2at2Displacement and Velocity MCQs: common questions
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