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Newtonian Mechanics

Quick questions on Kinematics of linear motion explained: H2 Physics Newtonian Mechanics

5short 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 reading motion graphs?
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The graphs encode the relationships geometrically:
What is vertical motion under gravity?
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Free fall is uniformly accelerated motion with a=ga = g (about 9.81 m s29.81\ \text{m s}^{-2}) directed downward. Choose a sign convention (commonly upward positive) and apply it consistently: the launch speed, the acceleration and the displacement all carry signs relative to that choice.
What is q1?
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Define velocity and acceleration, and state how each is found from a velocity-time graph. [3 marks]
What is q2?
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A cyclist accelerates from 4.0 m s14.0\ \text{m s}^{-1} to 10 m s110\ \text{m s}^{-1} in 3.0 s3.0\ \text{s}. Find the acceleration and the distance travelled. [3 marks]
What is q3?
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An object is projected vertically upward and returns to its starting point. Sketch its velocity-time graph and explain what the area between the line and the time axis represents. [3 marks]

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