Question

A racecar driver on a flat racetrack steps on the gas, changing her velocity from 10 m/sec to 30 m/sec in 5 seconds. What is the acceleration of the racecar during that time frame?

Answer 1

`a = 4\,(m)/(s^(2))`

Step-by-step explanation:

The acceleration of the racecar is:

`a = (v-v_(o))/(\Delta t)`

`a = (30\,(m)/(s) - 10\,(m)/(s) )/(5\,s)`

`a = 4\,(m)/(s^(2))`

Answer 2

4m/s2

Step-by-step explanation:

The following data were obtained from the question:

U (initial velocity) = 10m/s

V (final velocity) = 30m/s

t (time) = 5secs

a (acceleration) =?

Acceleration is the rate of change of velocity with time. It is represented mathematically as:

a = (V - U)/t

Now, with this equation i.e

a = (V - U)/t, we can calculate the acceleration of the race car as follow:

a = (V - U)/t

a = (30 - 10)/5

a = 20/5

a = 4m/s2

Therefore, the acceleration of the race car is 4m/s2