Question

If a car goes from 60 miles per hour to 10 miles per hour in 5 seconds, find its acceleration. Enter your answer as a whole number. Do not label with units of measurement. For example "12." If the answer is a negative number, then you would enter "-12." No spaces between the negative sign and the number. *

Answer 1

`a=-4.47\ m/s^2`

Explanation:

Given that,

Initial speed of a car, u = 60 mph = 26.82 m/s

Final speed of a car, v = 10 mph = 4.47 m/s

Time, t = 5 s

We need to find the acceleration of the car. The rate of change of velocity is called the acceleration of an object. It can be given by :

`a=(v-u)/(t)\\\\a=(4.47 -26.82 )/(5)\\\\a=-4.47\ m/s^2`

So, the acceleration of the car is
`4.47\ m/s^2` and it is deaccelerating.