Question

A car moving south speeds up from 10 m/s to 40 m/s in 15 seconds. What is the car’s acceleration?

Answer 1

Answer is 2m/s sq because V-u /t us acceleration 40-10/15=2

Answer 2

Answer : The car’s acceleration is,
`2m/s^2`

Solution :

Acceleration : It is defined as the change in the velocity of an object with respect to the time.

Formula used :

`a=(v_(final)-v_(initial))/(t)`

where,

a = acceleration of car = ?

`v_(final)` = final velocity of car = 40 m/s

`v_(initial)` = initial velocity of car = 10 m/s

t = time taken = 15 s

Now put all the given values in this formula, we get the acceleration of car.

`a=(40m/s-10m/s)/(15s)=2m/s^2`

Therefore, the acceleration of car is,
`2m/s^2`