Question

12/20
acceleration can be classified as __________
changing directions
slowing down
speeding up
all of the above

Explanation:

Acceleration is defined as the rate of change of velocity. Velocity is a vector quantity that includes both speed and direction. So, when an object changes direction (even if speed is constant), slows down (deceleration, a type of acceleration with negative magnitude), or speeds up, it is experiencing acceleration. Thus, all the given options are cases of acceleration.

Answer:

D. All of the above (assuming the options are labeled A to D with A: Changing directions, B: Slowing Down, C: Speeding up, D: All of the above)