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| 1. |
` vec A , vec B and vec C` are three non-collinear, non co-planar vectors. What can you say about direction of ` vec A xx vec (B xx vec C`) ? |
| Answer» ` (vec Bxx vec C)` will act perpecndcular to the plane constaining ` vec B and vec C` and is derected as given by right hand rule. `(vec A xx (vec B xx vec C)` will lie in the plane of `vec B and vec C` and is perpwndicular to vector `vec A`. | |