1.

Forces proportional to `AB , BC` and `2 CA` act along the slides of a triangle `ABC` in magnitude and direction byA. CAB. ACC. BCD. CB

Answer» Correct Answer - A
For triangle `ABC: vec(AB)+vec(BC)+vec(CA)=vec(0)`
Now `vec(AB)+vec(BC)+2vec(CA)`
`=vec(AB)+vec(BC)+vec(CA)+vec(CA)+vec(0)+vec(CA)=vec(CA)`


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