Physics for IGCSE & O level - Forces And Motion (Section 11 - No. 17)
Which scenario describes a car's acceleration?
The car drives at a constant 60 km/h.
The car increases its speed from 20 km/h to 40 km/h.
The car drives in a straight line at a constant speed.
The car stays parked.
Shpjegimi
Acceleration involves a change in speed or direction.