A car accelerates uniformly from 0 to 20 m/s in 4 s. What is its 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 car accelerates uniformly from 0 to 20 m/s in 4 s. What is its acceleration?

Explanation:
Understanding acceleration as the rate at which velocity changes over time. The car goes from 0 to 20 m/s in 4 seconds, so the acceleration is a = Δv/Δt = (20 − 0) / 4 = 5 m/s^2. That value means the velocity increases by 5 m/s each second under this uniform acceleration. The other numbers would require different changes in velocity or time, so they don’t fit this scenario.

Understanding acceleration as the rate at which velocity changes over time. The car goes from 0 to 20 m/s in 4 seconds, so the acceleration is a = Δv/Δt = (20 − 0) / 4 = 5 m/s^2. That value means the velocity increases by 5 m/s each second under this uniform acceleration. The other numbers would require different changes in velocity or time, so they don’t fit this scenario.

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