Physics for IGCSE & O level - Forces And Motion (Section 5 - No. 26)
What best describes the relationship between acceleration and velocity?
Acceleration indicates change in velocity.
If acceleration is zero, velocity must be zero.
The direction of acceleration is the direction of change in velocity.
Velocity can change if acceleration is constant.
Explication
Acceleration causes changes in velocity. Acceleration is related to change in velocity's direction.