1MA0 Higher June 2017 Paper 2 Q20
20 \(T\) is inversely proportional to \(d^2\)
\(T = 12\) when \(d = 8\)
Find the value of \(T\) when \(d = 0.5\) (3)
| Answer | Mark | Notes |
|---|---|---|
| 3072 | 3 | M1 for \(12 = \dfrac{k}{8^2}\) or \(12 \times 8^2\) (= 768) oe or \((8 \div 0.5)^2\) (= 256) M1 (dep) for substituting into \(T = \dfrac{k}{d^2}\) e.g. \((T =) \dfrac{\text{``}768\text{''}}{0.5^2}\) oe eg \(12 \times 8^2 \div 0.5^2\) oe A1 cao |