Question

A car starts from rest and attains a velocity of 10 m/s in 40s. The driver applies Brakes and
slows down the car to 5 m/s in 10s. What is the acceleration of the car in both the cases?​

Answer 1

Step-by-step explanation:

GIVEN:-

=> A car starts from rest and attains a velocity of 10 m/s in 40s.

=>The driver applies Brakes and slows down the car to 5 m/s in 10s.

TO FIND:-

=> The acceleration of the car in both cases.

UNDERSTANDING THE CONCEPT:-

According to the question,

=> We know that acceleration is the rate of change of velocity. So, we should calculate acceleration by the respective formula.

$\huge\bf\underline{Answer:}$

$\sf{A = \dfrac{v - u}{t} }$

=>In 1st case,

$\sf{a = \dfrac{10 - 0}{40} }$

a=0.25m/s^2

=>In 2nd case,

$\sf{a = \dfrac{5 - 10}{10} }$

a= 0.5m/s^2.

Therefore, acceleration of the car in both the cases is 0.25m/s^2 and 0.5m/s^2.