Question

F is inversely proportional to the square of r. When F = 50, r = 3. Calculate the constant of variation.

Answer 1

Step-by-step explanation:

$f \alpha \frac{1}{ {r}^{2} } \\ f = k \frac{1}{ {r}^{2} } \\ f {r}^{2} = k \\ 50 \times ({3})^{2} = k \\ k = 450$