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 :

$a=\frac{v_{final}-v_{initial}}{t}$

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.

$a=\frac{40m/s-10m/s}{15s}=2m/s^2$

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