Mathematics · May / June 2021 · Paper 22 · Question 21
0580
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The force of attraction, F Newtons, between two magnets is inversely proportional to the square of the distance, d cm, between the magnets. When . d 1 5 = , F 48 = .
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21(a)[2]
108 [ F = ] final answer 2 d [2]
M1 for k F = oe or better 2 d
21(b)[1]
]1 4 [ n = or 0.25 [1]
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