Q / āĻĒā§ā§°āĻļā§āĻ¨: A scooter moves east at 5 m/s. After 5 seconds, its velocity becomes 15 m/s east. (āĻāĻāĻ¨ āĻ¸ā§āĻā§āĻāĻžā§° 5 m/s āĻĒā§āĻŦ āĻĻāĻŋāĻļā§ āĻāĻ¤āĻŋ āĻā§°ā§āĨ¤ 5 āĻā§āĻā§āĻŖā§āĻĄ āĻĒāĻŋāĻāĻ¤ āĻāĻ¯āĻŧāĻžā§° āĻŦā§āĻ 15 m/s āĻĒā§āĻŦ āĻĻāĻŋāĻļā§ āĻšāĻ¯āĻŧāĨ¤)
Given / āĻĻāĻŋāĻ¯āĻŧāĻž āĻāĻā§
- Initial Velocity (āĻĒā§ā§°āĻžā§°āĻŽā§āĻāĻŋāĻ āĻŦā§āĻ) = 5 m/s east
- Final Velocity (āĻ
āĻ¨ā§āĻ¤āĻŋāĻŽ āĻŦā§āĻ) = 15 m/s east
- Time Taken (āĻ˛ā§ā§ąāĻž āĻ¸āĻŽāĻ¯āĻŧ) = 5 s
1st: Find Change in Velocity (āĻŦā§āĻā§° āĻĒā§°āĻŋāĻŦā§°ā§āĻ¤āĻ¨ āĻāĻ˛āĻŋāĻ¯āĻŧāĻžāĻāĻ)
Change in Velocity = Final Velocity − Initial Velocity
= 15 − 5 = 10 m/s east (10 m/s āĻĒā§āĻŦ āĻĻāĻŋāĻļā§)
2nd: Calculate Acceleration (āĻ¤ā§āĻŦā§°āĻŖ āĻāĻŖāĻ¨āĻž āĻā§°ā§āĻ)
Acceleration = Change in Velocity ÷ Time
= 10 ÷ 5 = 2 m/s² east
Ans / āĻāĻ¤ā§āĻ¤ā§°: Acceleration = 2 m/s² east (āĻ¤ā§āĻŦā§°āĻŖ = 2 m/s² āĻĒā§āĻŦ āĻĻāĻŋāĻļā§)
Note: i. Velocity tells the motion now. (āĻŦā§āĻā§ āĻŦā§°ā§āĻ¤āĻŽāĻžāĻ¨ā§° āĻāĻ¤āĻŋ āĻŦā§āĻāĻžāĻ¯āĻŧāĨ¤)
ii. Acceleration tells how the motion changed. (āĻ¤ā§āĻŦā§°āĻŖā§ āĻāĻ¤āĻŋ āĻā§āĻ¨ā§āĻā§ āĻ¸āĻ˛āĻ¨āĻŋ āĻš'āĻ˛ āĻ¤āĻžāĻ āĻŦā§āĻāĻžāĻ¯āĻŧāĨ¤ )