2026 PHS P1 Q14

2026 PHS P1 Q14

Secondary 4
3 marks

The force, \(F\), between two objects is inversely proportional to the square of the distance, \(d\), between them.

  1. Sketch the graph of \(F\) against \(d\).[1]
  1. The distance between the objects is increased by 30%.
    Calculate the percentage reduction in the force between the objects.[2]

Solution:

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Answer:(a) Decreasing inverse-square curve in the first quadrant. (b) \(40.8\%\)

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