Question detail
A car accelerates from a speed of 10 m/s to 30 m/s in 5 seconds. Calculate the acceleration of the car Explain your answer using Acceleration and acceleration.
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
Question
Type
exam_style
Style
Topic
Forces and motion
Question
A car accelerates from a speed of 10 m/s to 30 m/s in 5 seconds. Calculate the acceleration of the car Explain your answer using Acceleration and acceleration.
Answer
4 m/s²
Explanation
A strong answer should address calculate time from change in velocity and acceleration directly. Use the context of Acceleration within Forces and motion, then state the relevant forces or motion reasoning with units where needed. The answer is correct when it names the key physics quantity, keeps speed and velocity distinct, and links the conclusion back to the approved learning objective.
Common mistake
Misusing the acceleration formula
Students often write t = Δv ÷ a instead of t = Δv ÷ a, but then treat a as a scalar without considering direction, leading to incorrect sign or magnitude for time
Remember that time is always positive; use the magnitude of acceleration and change in velocity, and apply the correct sign convention only when calculating velocity, not time.
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