Ans with sol 29 A vector A is along the positive z-axis and its vector product with another - Physics - Motion In A Plane

Question

Ans with sol

29 A vector A is along the positive z-axis and its vector product
with another vector B is zero, then vector B could be

a   i ^   +   j ^          
                 
                 
      b   4 i ^ c   j ^   +   k
^                  
                 
              d   - 7 k ^

Decoder_2 · Accepted Answer

Dear student,A→ is acting along Z direction
A→ = k^A→ × B→ = 0A→B→sinθ = 0k^B→sinθ = 0B→ can not be zero as magnitude of the vector can not be zero
⇒ sin θ = 0θ = 0therefore angle between them is zero
 hence B → is also acting along Z -axis
Hence the right option is (d)Regards

Ans with sol 29. A vector A is along the positive z-axis and its vector product with another vector B is zero, then vector B could be. a i ^ + j ^ b 4 i ^ c j ^ + k ^ d - 7 k ^

Ans with sol

29. A vector A is along the positive z-axis and its vector product with another vector B is zero, then vector B could be.

$(a) \hat{i} + \hat{j} (b) 4 \hat{i} (c) \hat{j} + \hat{k} (d) - 7 \hat{k}$