Difference between āĻŦ⧇āĻ— (Velocity) vs āĻ¤ā§āĻŦā§°āĻŖ (Acceleration)


What is Velocity ? / āĻŦ⧇āĻ— āĻ•āĻŋ ?


Velocity tells us how fast an object moves and in which direction. (āĻŦ⧇āϗ⧇ āφāĻŽāĻžāĻ• āĻ•āϝāĻŧ āϝ⧇ āϕ⧋āύ⧋ āĻŦāĻ¸ā§āϤ⧁ āĻ•āĻŋāĻŽāĻžāύ āĻĻā§ā§°ā§āϤ āφ⧰⧁ āϕ⧋āύ āĻĻāĻŋāĻļāϤ āĻ—āϤāĻŋ āϕ⧰āĻŋ āφāϛ⧇āĨ¤)


What is Acceleration ? / āĻ¤ā§āĻŦā§°āĻŖ āĻ•āĻŋ ?


Acceleration tells us how quickly velocity changes. (āĻ¤ā§āĻŦā§°āϪ⧇ āφāĻŽāĻžāĻ• āĻ•āϝāĻŧ āϝ⧇ āĻŦ⧇āĻ— āĻ•āĻŋāĻŽāĻžāύ āĻĻā§ā§°ā§āϤ āϏāϞāύāĻŋ āĻšāϝāĻŧāĨ¤)


Difference Between āĻŦ⧇āĻ— (Velocity) & āĻ¤ā§āĻŦā§°āĻŖ (Acceleration)



  1. Meaning / āĻ…ā§°ā§āĻĨ: i. Velocity (āĻŦ⧇āĻ—): Rate of change of displacement. (āĻ¸ā§āĻĨāĻžāύāĻžāĻ¨ā§āϤ⧰⧰ āĻĒā§°āĻŋāĻŦā§°ā§āϤāύ⧰ āĻšāĻžā§°āĨ¤)  ii. Acceleration (āĻ¤ā§āĻŦā§°āĻŖ): Rate of change of velocity. (āĻŦ⧇āĻ—ā§° āĻĒā§°āĻŋāĻŦā§°ā§āϤāύ⧰ āĻšāĻžā§°āĨ¤)

  2. Formula / āϏ⧂āĻ¤ā§ā§°: i. Velocity (āĻŦ⧇āĻ—): V = Displacement ÷ Time (V = āĻ¸ā§āĻĨāĻžāύāĻžāĻ¨ā§āϤ⧰ ÷ āϏāĻŽāϝāĻŧ),  ii. Acceleration (āĻ¤ā§āĻŦā§°āĻŖ): a = Change in Velocity ÷ Time (a = āĻŦ⧇āĻ—ā§° āĻĒā§°āĻŋāĻŦā§°ā§āϤāύ ÷ āϏāĻŽāϝāĻŧ)

  3. What it tells / āĻ•āĻŋ āĻŦ⧁āϜāĻžāϝāĻŧ: i. Velocity (āĻŦ⧇āĻ—): How fast and in what direction. (āĻ•āĻŋāĻŽāĻžāύ āĻĻā§ā§°ā§āϤ āφ⧰⧁ āϕ⧋āύ āĻĻāĻŋāĻļāϤāĨ¤),  ii. Acceleration (āĻ¤ā§āĻŦā§°āĻŖ): How velocity is changing. (āĻŦ⧇āĻ— āϕ⧇āύ⧇āĻ•ā§ˆ āϏāϞāύāĻŋ āĻšā§ˆāϛ⧇āĨ¤)

  4. Unit / āĻāĻ•āĻ•: i. Velocity (āĻŦ⧇āĻ—): m/s or km/h,  ii. Acceleration (āĻ¤ā§āĻŦā§°āĻŖ): m/s²

  5. Nature / āĻĒā§ā§°āĻ•ā§ƒāϤāĻŋ: i. Velocity (āĻŦ⧇āĻ—): Vector Quantity. (āϭ⧇āĻ•ā§āϟ⧰ ā§°āĻžāĻļāĻŋāĨ¤),  ii. Acceleration (āĻ¤ā§āĻŦā§°āĻŖ): Vector Quantity. (āϭ⧇āĻ•ā§āϟ⧰ ā§°āĻžāĻļāĻŋāĨ¤)

  6. Example / āωāĻĻāĻžāĻšā§°āĻŖ: i. Velocity (āĻŦ⧇āĻ—): 20 m/s east (20 m/s āĻĒā§‚āĻŦ āĻĻāĻŋāĻļ⧇).  ii. Acceleration (āĻ¤ā§āĻŦā§°āĻŖ): 2 m/s² east (2 m/s² āĻĒā§‚āĻŦ āĻĻāĻŋāĻļ⧇)





Note: i. Velocity describes motion. (āĻŦ⧇āϗ⧇ āĻ—āϤāĻŋā§° āĻŦā§°ā§āĻŖāύāĻž āϕ⧰⧇āĨ¤),  ii. Acceleration describes change in motion. (āĻ¤ā§āĻŦā§°āϪ⧇ āĻ—āϤāĻŋā§° āĻĒā§°āĻŋāĻŦā§°ā§āϤāύ⧰ āĻŦā§°ā§āĻŖāύāĻž āϕ⧰⧇āĨ¤

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Velocity (āĻŦ⧇āĻ—) & Acceleration (āĻ¤ā§āĻŦā§°āĻŖ) MCQ


1. Velocity is the rate of change of: (ā§§. āĻŦ⧇āĻ— āĻ•āĻŋāĻšā§° āĻĒā§°āĻŋāĻŦā§°ā§āϤāύ⧰ āĻšāĻžā§° ?)


(a) Distance (āĻĻā§‚ā§°āĻ¤ā§āĻŦ)  (b) Displacement (āĻ¸ā§āĻĨāĻžāύāĻžāĻ¨ā§āϤ⧰)  (c) Speed (āĻĻā§ā§°ā§āϤāĻŋ)  (d) Time (āϏāĻŽāϝāĻŧ)


Ans / āωāĻ¤ā§āϤ⧰: (b) Displacement


Explanation / āĻŦā§āϝāĻžāĻ–ā§āϝāĻž: Velocity = Displacement ÷ Time. (āĻŦ⧇āĻ— = āĻ¸ā§āĻĨāĻžāύāĻžāĻ¨ā§āϤ⧰ ÷ āϏāĻŽāϝāĻŧāĨ¤)


2. Acceleration is the rate of change of: (⧍. āĻ¤ā§āĻŦā§°āĻŖ āĻ•āĻŋāĻšā§° āĻĒā§°āĻŋāĻŦā§°ā§āϤāύ⧰ āĻšāĻžā§° ?)

(a) Distance (āĻĻā§‚ā§°āĻ¤ā§āĻŦ)  (b) Speed (āĻĻā§ā§°ā§āϤāĻŋ)  (c) Velocity (āĻŦ⧇āĻ—)  (d) Mass (āĻ­ā§°)


Ans / āωāĻ¤ā§āϤ⧰: (c) Velocity


Explanation / āĻŦā§āϝāĻžāĻ–ā§āϝāĻž: Acceleration measures the change in velocity. (āĻ¤ā§āĻŦā§°āϪ⧇ āĻŦ⧇āĻ—ā§° āĻĒā§°āĻŋāĻŦā§°ā§āϤāύ āϜ⧁āϖ⧇āĨ¤)


3. Which formula is correct for velocity ? (ā§Š. āĻŦ⧇āĻ—ā§° āĻŦāĻžāĻŦ⧇ āϕ⧋āύāĻŸā§‹ āϏ⧂āĻ¤ā§ā§° āϏāĻ āĻŋāĻ• ?)

(a) Velocity = Distance × Time  (b) Velocity = Displacement ÷ Time   (c) Velocity = Force ÷ Time  (d) Velocity = Mass × Time


Ans / āωāĻ¤ā§āϤ⧰: (b) Velocity = Displacement ÷ Time


4. The SI unit of acceleration is: (ā§Ē. āĻ¤ā§āĻŦā§°āĻŖā§° SI āĻāĻ•āĻ• āĻ•āĻŋ ?)

(a) m/s   (b) km/h   (c) m/s²  (d) N


Ans / āωāĻ¤ā§āϤ⧰: (c) m/s²


5. Which quantity tells how fast and in what direction an object moves ? (ā§Ģ. āϕ⧋āύ ā§°āĻžāĻļāĻŋāϝāĻŧ⧇ āϕ⧋āύ⧋ āĻŦāĻ¸ā§āϤ⧁ āĻ•āĻŋāĻŽāĻžāύ āĻĻā§ā§°ā§āϤ āφ⧰⧁ āϕ⧋āύ āĻĻāĻŋāĻļāϤ āĻ—āϤāĻŋ āϕ⧰⧇ āϤāĻžāĻ• āĻŦ⧁āϜāĻžāϝāĻŧ ?)

(a) Distance  (b) Speed  (c) Velocity  (d) Acceleration


Ans / āωāĻ¤ā§āϤ⧰: (c) Velocity


6. Which quantity tells how velocity is changing ? (ā§Ŧ. āϕ⧋āύ ā§°āĻžāĻļāĻŋāϝāĻŧ⧇ āĻŦ⧇āĻ— āϕ⧇āύ⧇āĻ•ā§ˆ āϏāϞāύāĻŋ āĻšā§ˆāϛ⧇ āϤāĻžāĻ• āĻŦ⧁āϜāĻžāϝāĻŧ ?)

(a) Distance  (b) Velocity  (c) Time  (d) Acceleration


Ans / āωāĻ¤ā§āϤ⧰: (d) Acceleration


7. Which of the following is an example of velocity ?  ā§­. āϤāϞ⧰ āϕ⧋āύāĻŸā§‹ āĻŦ⧇āĻ—ā§° āωāĻĻāĻžāĻšā§°āĻŖ ?

(a) 20 m/s  (b) 10 km  (c) 20 m/s east  (d) 5 s


Ans / āωāĻ¤ā§āϤ⧰: (c) 20 m/s east


Explanation / āĻŦā§āϝāĻžāĻ–ā§āϝāĻž: Direction (east) is given, so it is velocity. (āĻĻāĻŋāĻļ (āĻĒā§‚āĻŦ) āωāĻ˛ā§āϞ⧇āĻ– āφāϛ⧇, āϏ⧇āϝāĻŧ⧇ āχ āĻŦ⧇āĻ—āĨ¤)


8. Which of the following is an example of acceleration ? (ā§Ž. āϤāϞ⧰ āϕ⧋āύāĻŸā§‹ āĻ¤ā§āĻŦā§°āĻŖā§° āωāĻĻāĻžāĻšā§°āĻŖ ?)

(a) 30 km/h north  (b) 15 m/s west   (c) 2 m/s² east   (d) 10 m


Ans / āωāĻ¤ā§āϤ⧰: (c) 2 m/s² east


9. Velocity and acceleration are both: (⧝. āĻŦ⧇āĻ— āφ⧰⧁ āĻ¤ā§āĻŦā§°āĻŖ āĻĻ⧁āϝāĻŧā§‹āϟāĻžāχ āĻ•āĻŋ ?)

(a) Scalar Quantities  (b) Vector Quantities   (c) Units  (d) Forces


Ans / āωāĻ¤ā§āϤ⧰: (b) Vector Quantities


Explanation / āĻŦā§āϝāĻžāĻ–ā§āϝāĻž: Both have magnitude and direction. (āĻĻ⧁āϝāĻŧā§‹āϟāĻžā§°ā§‡āχ āĻŽāĻžāύ āφ⧰⧁ āĻĻāĻŋāĻļ āĻĨāĻžāϕ⧇āĨ¤)


10. Which statement is correct ? (ā§§ā§Ļ. āϕ⧋āύāĻŸā§‹ āωāĻ•ā§āϤāĻŋ āϏāĻ āĻŋāĻ• ?)

(a) Velocity describes change in motion.
(b) Acceleration describes motion.
(c) Velocity describes motion and acceleration describes change in motion.
(d) Both are scalar quantities.


Ans / āωāĻ¤ā§āϤ⧰: (c) Velocity describes motion and acceleration describes change in motion.


Explanation / āĻŦā§āϝāĻžāĻ–ā§āϝāĻž: Velocity tells about motion, while acceleration tells about changes in motion. (āĻŦ⧇āϗ⧇ āĻ—āϤāĻŋā§° āĻŦāĻŋāώāϝāĻŧ⧇ āĻ•āϝāĻŧ, āφ⧰⧁ āĻ¤ā§āĻŦā§°āϪ⧇ āĻ—āϤāĻŋā§° āĻĒā§°āĻŋāĻŦā§°ā§āϤāύ⧰ āĻŦāĻŋāώāϝāĻŧ⧇ āĻ•āϝāĻŧāĨ¤)