Question

A driver decreases the speed of a car from 25m/s to 10m/s in 5 second. Find the acceleration of the car?

Answer 1

V = 10M/S
U = 25M/S
T = 5Sec
A = ?

According to the 1st Formula of Motion

V= U+AT
10 = 25+A×5
10 = 25+5A
10-25 = 5A
-15 = 5A
A = -15/3
A = -5M/Sec²

Here the Velocity Is Decreasing So, Retardation Will Happen

Retardation = -5M/Sec ²
Ans


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Answer 2

$\red{HEY\:BUDDY!!}$

HERE'S THE ANSWER..

_____________________________

♠️ We'll denote the following data

⏺️ Initial velocity ( u ) = 25 m / s

⏺️ Final velocity ( v ) = 10 m / s

⏺️time ( t ) = 5 second

⏺️ Acceleration ( a ) = ?

▶️ We know Acceleration is change in velocity with respect to time , i.e

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

=> a = ( v - u ) / t

=> a = ( 10 - 25 ) / 5

=> a = - 15 / 5

=> $\boxed{ a\:= \:-3 m/s^2}$✔️✔️

♠️ Here's Acceleration is negative because car is decreasing it's speed or it is Retarding

HOPE HELPED..

$\red{JAI HIND..}$

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