Two forces having magnitude A and A 2 are perpendicular to each other. The magnitude of their resultant is:

Step-by-step solution

Using parallelogram law of vector addition, the formula can be written as A net = A 1 2 + A 2 2 + 2 A 1 A 2 cos θ The data given is A 1 → = A ,   A 2 → = A 2 Since the vectors are perpendicular cos 90 ° = 0 ⇒ F net = A 2 + A 2 4 = 5 A 2