Question

Acceleration is when an

b.change direction

a. object speed up

both a. and b.
neither a. or b.​

Answer 1

Answer:

acceleration is when object speeds up

Answer 2

both a and b

An object which experiences either a change in the magnitude or the direction of the velocity vector can be said to be accelerating. This explains why an object moving in a circle at constant speed can be said to accelerate - the direction of the velocity changes.