Kinematics Question 453

Question: If three vectors along coordinate axes represent the adjacent sides of a cube of length b, then the unit vector along it’s diagonal passing through the origin will be

Options:

A) i^+j^+k^2

B) i^+j^+k^3b

C) i^+j^+k^

D) i^+j^+k^3

Show Answer

Answer:

Correct Answer: D

Solution:

[d] Diagonal vector A=bi^+bj^+bk^ or A=b2+b2+b2=3b

A^=AA=i^+j^+k^3

A^=AA=i^+j^+k^3



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