Question

The force, F newtons, exerted by a magnet on a metal object is inversely

proportional to the square of the distance d cm.
When d = 2 cm, F= 50 N.
Express F in terms of d.

Answer 1

F = 200/d^2

Explanation:

F is inversely proportional to d^2

The equation is;

F = k/d^2

K = F•d^2

so to get k, we substitute the given values

K = 50 * 2^2

K = 50 * 4

K = 200

So we have that;

F * d^2 = 200

F = 200/d^2