Question

Two vector a = 3ỉ +8j-2Â and
b=6î+16j+ xâ are such that the component of
b perpendicular to ā is zero. Then the value of x
will be :-
​

Answer 1

Answer:

73

Explanation:

As dot product of perpendicular vectors is 0 because cos90 is 0.

Dot product of above vector is:

(3×6)+(8×16)+(-2×x)=0

=146-2x=0

-146=-2x

x=73