4MA1/1H Jun 2020, Question 14: Inverse Proportion: y = k/x
Pearson Edexcel International GCSE Mathematics A 4MA1 · Paper 1H (Higher) · Calculator · 3 marks
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The question, in short
F is inversely proportional to v squared; use F = 6.5 when v = 4 to find a formula giving F in terms of v.
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Solution · 3 marks
- 1F = k/v²
- 2F = 6.5 when v = 4: 6.5 = k/16
- 3k = 6.5 × 16 = 104
- 4F = 104/v²
AnswerF = 104/v²
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