VectorHard

Question

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

Options

A.cannot be predicted
B.are equal to each other
C.are equal to each other in magnitude
D.are not equal to each other in magnitude

Solution

= vector sum =
= vector sum
Since and are perpendicular
∴ . = 0
⇒   = 0 ⇒ A2 = B2
⇒ |A| = |B|

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