Which physical quantity measures how quickly a point particle changes its position over time?
A) Centripetal acceleration
B) Velocity
C) Natural angular frequency
D) Acceleration
E) Frequency
IMAT 2026 · Question 48
Q48 - Kinematics and uniform motion
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The correct answer is B) Velocity.
Velocity is the rate of change of position with time: v = Δs/Δt, measured in m/s.
A) Incorrect: Centripetal acceleration (v²/r) describes the change in direction during circular motion.
B) Correct: Velocity measures how fast position changes.
C) Incorrect: The natural angular frequency describes how fast an oscillator vibrates (such as a mass on a spring).
D) Incorrect: Acceleration is the rate of change of velocity, not of position.
E) Incorrect: Frequency is the number of cycles per second (Hz).
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