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Newtonian Mechanics

Quick questions on Newton's laws of motion explained: H2 Physics Newtonian Mechanics

3short 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 is q1?
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State Newton's second law in terms of momentum, and show how it reduces to F=maF = ma for constant mass. [3 marks]
What is q2?
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A 0.058 kg0.058\ \text{kg} tennis ball is struck, changing its velocity from −30 m s−1-30\ \text{m s}^{-1} to +40 m s−1+40\ \text{m s}^{-1} in 5.0 ms5.0\ \text{ms}. Find the average force on the ball. [3 marks]
What is q3?
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Identify the third-law pair of the upward push of the ground on a person standing still. [2 marks]

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