Question

Two perpendicular forces of magnitudes 10N and 5N act a point.find their resultant

Answer 1

$\sqrt{125} = 5 \sqrt{5}$

Answer 2

As we know
r = √(a^2 + b^2 + 2abcos theta)
= √(10^2 + 5^2 + 2 × 10 ×5 × 0)
= √ ( 100 + 25)
=√ 125
=5√5
hope it will help you