Question

A driver starts his parked car and within 5 seconds reaches a speed of 60 km/h, as he travels east. What is his acceleration?

Answer 1

Acceleration `= 0.00333"km/"sec"^2`

Explanation:

Acceleration = velocity/time
The direction is irrelevant.
We just need to make the units consistent.

`60 "km"/"hr" xx "hr"/(60 "min")xx"min"/(60 "sec") = 0.01667 "km"/sec`

Acceleration `= (0.01667 "km"/sec) /(5"sec") = 0.00333"km/"sec"^2`