Question

A car accelerates uniformly from rest to a speed of 18 m/s in 12 seconds. Find the acceleration of the car over this period.

Answer 1

The correct answer is
`1.5 m/ s^(2)`

Step-by-step explanation:

In general terms, the acceleration refers to how velocity changes or increases. This is measured in meters per second squared (
`m/s^(2)`) or similar units such as kilometers per hour squared (
`km/h^(2)`). Moreover, to calculate acceleration it is necessary to subtract the initial velocity from the final velocity and then divide this into the time. The formula and operation are shown below:

`a (acceleration) = (v (final velocity) - u (initial velocity))/(t (time))`

`a= (18 m/s - 0 m/s)/(12 s)` (Initial velocity is 0 m/s because the car was at rest)

`a = (18 m/s)/( 12 s)`

`a = 1.5 m/s^(2)`

According to this, the acceleration of the car was
`1.5 m/s^(2)`