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AS Unit 2 Applied Mathematics A

Quick questions on Kinematics: motion graphs and the constant-acceleration equations - WJEC A-Level Maths

6short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.

What are motion graphs?
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Splitting a velocity-time graph into triangles and rectangles is the quickest way to find displacement when the motion has several phases.
What are the constant-acceleration equations?
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For motion in a straight line with constant acceleration:
What is vertical motion under gravity?
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A body moving vertically under gravity has acceleration g≈9.8 m s−2g \approx 9.8\,\text{m s}^{-2} directed downward. Choose a positive direction and apply the suvat equations with a=ga = g (or −g-g if up is positive). At the highest point of an upward throw the velocity is momentarily zero.
What is q1?
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A car travels at constant 25 m s−125\,\text{m s}^{-1} for 8 s8\,\text{s}. Find the distance covered. [2 marks]
What is q2?
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A ball is dropped from rest. Find its speed after 3 s3\,\text{s} (take g=9.8 m s−2g = 9.8\,\text{m s}^{-2}). [2 marks]
What is q3?
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A particle decelerates uniformly from 30 m s−130\,\text{m s}^{-1} to rest in 120 m120\,\text{m}. Find the deceleration. [3 marks]

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