Question

which of the following describe acceleration? choose 3 answers: a how quickly an object changes direction b how quickly an object speeds up c how quickly an object slows down d how fast an object moves

Explanation:

• Option A: Acceleration involves changes in velocity, and a change in direction is a change in velocity (since velocity is a vector with direction), so how quickly an object changes direction is related to acceleration.
• Option B: Speeding up means a change in speed (a component of velocity), and the rate of this change is acceleration, so how quickly an object speeds up describes acceleration.
• Option C: Slowing down is also a change in speed (deceleration, which is a type of acceleration), so how quickly an object slows down describes acceleration.
• Option D: "How fast an object moves" describes speed, not acceleration.

Answer:

A. how quickly an object changes direction, B. how quickly an object speeds up, C. how quickly an object slows down