Question

Cody's car accelerates from 0m/s to 45 m/s northward in 15 seconds.What is the acceleration of the car?

Answer 1

Given that,

Initial speed of car, u = 0 m/s

Final speed of a car, v = 45 m/s

Time, t = 15 s

To find,

The acceleration of the car.

Solution,

The change in velocity divided by time taken is called acceleration of an object. Let a be the acceleration of the car. Using the mathematical form of acceleration as follows :

$a=\dfrac{v-u}{t}\\\\a=\dfrac{45\ m/s-0}{15\ s}\\\\a=3\ m/s^2$

So, the acceleration of the car is 3 m/s².

Answer 2

Question:-

A car accelerates from 0m/s to 45 m/s northward in 15 seconds.What is the acceleration of the car?

Solution:-

Given,

• Car accelerates from 0 to 45m/s in 15 sec.

We can find the acceleration of the car by using the first equation of motion:-

v = u + at

45 = 0 + 15a

45 = 15a

a = 45/15

a = 3

or

a = (v - u)/t

a = (45 - 0)/15

a = 45/15

a = 3