VectorHard
Question
Three forces start acting simultaneously on a particle moving with velocity
These forces are represented in magnitude and direction by the three sides of a triangle ABC(as shown). The particle will now move with velocity

These forces are represented in magnitude and direction by the three sides of a triangle ABC(as shown). The particle will now move with velocity 
Options
A.less than 

B.greater than 

C.|v| in the direction of the largest force BC
D.
, remaining unchanged.
, remaining unchanged.Solution
According to triangle law of vector addition if three vectors addition if three vectors are represented by three sides of a triangle taken in same order, then their resultant is zero. Therefore resultant of the forces acting on the particle is zero, so the particles velocity remains unchanged.
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