The vector sum of two forces is perpendicular to their vector differences .In that case , the forces

Options

A. Are equal to each other.
B. Are equal to each other in magnitude.
C. Are not equal to each other in magnitude.
D. Cannot be predicted.

Answer

2

Explanation

`(vecA + vecB) *(vecA-vecB) =0`
`rArr A^(2) - vecA*vecB+ vecB*vecA- B^(2) =0`
`rArr A= B (because vec A *vecb= vecB*vecA)`