Question

The magnitude of two perpendicular vectors are 25 unit. If its Y component is 15 unit what does this vector make the X axis?

Answer 1

Explanation:

|R|^2=A2+B2+2ABcos(x)

Here given R=25 and B = 15 and the vectors are perpendicular which implies x=90°

Therefore,

25²=A²+15²+2ABcos90°

625=A²+225

A²=625-225=400

A=±20 units