Question

F

∝
a
If
F
=
72
when
a
=
9
find,
F
when
a
=
7

Answer 1

56

Explanation:

F ∝ a

72 ∝ 9 write this using = :

72 = k9 find k

72/9 = 8

so: if a is 7

7 x 8 = 56