Question

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

Answer 1

Acceleration =

(change in speed) / (time for the change)
AND
(direction of the change)

-- Change in speed = (end value) - (start value) = 60 km/hr
= 16-2/3 m/s
-- Time for the change = 5 sec

-- Direction of the change = east.

Acceleration = 3-1/3 m/s² east .