The angle between A→ and A→ is θ. The value of

Home » Mechanics » Motion in a Plane » Question

The angle between A^{^→} and A^{^→} is θ. The value of the triple product A^{^→} . (B^{^→} × A^{^→}) is

1. A²B
2. zero
3. A²B sin θ
4. A²B cosθ

Correct Option: B

Note that (B^{^→} × A^{^→}) ⊥ A^{^→} . Hence their dot product is zero.