Question

mission kc4: acceleration
if an object has an acceleration then it must be _____. select all that apply.
a. changing its direction
b. changing its velocity
c. changing its speed
d. none of these

Explanation:

Acceleration is defined as the rate of change of velocity. Velocity is a vector quantity which has both magnitude (speed) and direction. An object can accelerate by changing its speed, changing its direction, or both. So if an object has an acceleration, it must be changing its velocity. Changing speed or direction are just specific cases of changing velocity.

Answer:

B. changing its velocity