Question

a boy running in a straight line increase his velocity from 12km/hr to 20km/hr in 20 sec.Find his average acceleration.

Answer 1

HEY MISS..!!

HERE'S THE ANSWER..

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♠️ Acceleration ( a ) of a body is defined as rate of change of velocity with respect to time , i.e

✔️ Acceleration = ( final velocity - initial velocity ) / time

⏺️Final velocity ( v ) = 20 Km / h = 5.5 m / s

⏺️ Initial velocity ( u ) = 12 Km / h = 3.3 m / s

⏺️time ( t ) = 20

▶️ Velocity is converted be we need SI unit in same form

=> a = ( v - u ) / t

=> a = ( 5.5 - 3.3 ) / 20

=> a = 2.2 / 20

=> [ a = 1.1 m / s^2 ]✔️✔️

♠️ Acceleration is 1.1 m / s^2

HOPE HELPED..

JAI HIND..

:-)