The vector sum of two forces is perpendiuclar to their vector difference. In that case, the force:

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)`