Question

Two force of magnitude 8N and 15N retrospectively acts at a point . If the resultant force is 17N , the angle between the forces has to be

Answer 1

resultant force is 17N=
$\sqrt{8 {}^{2} + 15 {}^{2} }$
so, the angle between the force has to be 90 degree

Answer 2

if two force will act perpendicularly... then solution can be done easily