Question

which of the following objects are accelerating? choose 3 answers: a an object thats moving in a straight line at a fast, constant speed b an object thats moving at a constant speed while turning c an object thats slowing down d an object thats speeding up

Explanation:

To determine acceleration, we use the definition: acceleration is a change in velocity (speed or direction).

• Option A: Constant speed and straight line mean velocity (speed + direction) is constant, so no acceleration.
• Option B: Turning changes direction, so velocity changes → acceleration occurs.
• Option C: Slowing down means speed (magnitude of velocity) changes → acceleration (deceleration is a type of acceleration).
• Option D: Speeding up means speed (magnitude of velocity) changes → acceleration.

So the objects accelerating are B, C, D.

Answer:

B. an object that's moving at a constant speed while turning
C. an object that's slowing down
D. an object that's speeding up