A and B Two vectors are in the xy plane. If 4 = 3m, |B| = 4m, and |A - B = 2 m find

a) The angle between B and A

b) The unit vector in the direction of (4 * B)

Question

Freddy Goodman

Physics

8 February, 22:46

A and B Two vectors are in the xy plane. If 4 = 3m, |B| = 4m, and |A - B = 2 m find

a) The angle between B and A

b) The unit vector in the direction of (4 * B)

+2

Answers (1)

Know the Answer?

Autumn Zhang · Answer 1

a)

A = 3m, B = 4m.

(A-B) ² = A² + B² - 2ABcosθ where θ is angle between A and B.

4 = 9 + 16 - 2. 3.4 cosθ

cosθ =.875

θ = 29°.

b) Unit vector in the direction of A X B will be k vector because A and B are in X-Y plane and A X B lies perpendicular to both A and B.

A and B Two vectors are in the xy plane. If 4 = 3m, |B| = 4m, and |A - B = 2 m finda) The angle between B and Ab) The unit vector in the direction of (4 * B)

A and B Two vectors are in the xy plane. If 4 = 3m, |B| = 4m, and |A - B = 2 m find

a) The angle between B and A

b) The unit vector in the direction of (4 * B)