We know that relative velocity is Va-Vb.But sometimes relative velocity is Va-(-Vb)=Va+Vb why is that so?and sometimes Va is negative.why is that so?
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Va - Vb when both are traveling in the same direction.
Va + Vb when both are travelling towards each other.
Va may be taken negative if it is traveling in the opposite direction away from b and b is traveling in the positive direction.
Va + Vb when both are travelling towards each other.
Va may be taken negative if it is traveling in the opposite direction away from b and b is traveling in the positive direction.
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