A runner accelerates from rest to 6 m/s in 3 s. What is the acceleration?

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Prepare for the Year 10 Force and Motion Test. Utilize flashcards and multiple-choice questions with clear hints and explanations to ensure success. Equip yourself for excellence on your exam!

Multiple Choice

A runner accelerates from rest to 6 m/s in 3 s. What is the acceleration?

Explanation:
Acceleration is how quickly velocity changes. Here the runner goes from 0 to 6 m/s in 3 seconds, so the velocity increases by 6 m/s over 3 s. Using a = Δv/Δt, you get a = 6 / 3 = 2 m/s^2. The units m/s^2 come from velocity change per second. This matches the scenario since reaching 6 m/s in 3 seconds requires an average acceleration of 2 m/s^2; other numbers would yield different final speeds after 3 seconds.

Acceleration is how quickly velocity changes. Here the runner goes from 0 to 6 m/s in 3 seconds, so the velocity increases by 6 m/s over 3 s. Using a = Δv/Δt, you get a = 6 / 3 = 2 m/s^2. The units m/s^2 come from velocity change per second. This matches the scenario since reaching 6 m/s in 3 seconds requires an average acceleration of 2 m/s^2; other numbers would yield different final speeds after 3 seconds.

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