Kinematics Question 292

Question: The area of the parallelogram whose sides are represented by the vectors j^+3k^ and i^+2j^k^ it’s

Options:

A) i^+10j^18k^517

B) i^10j^+18k^517

C) i^10j^18k^517

D) i^+10j^+18k^517

Show Answer

Answer:

Correct Answer: C

Solution:

A=2i^+2j^k^ and B=6i^3j^+2k^

C=A×B=(2i^+2j^k^)×(6i^3j^+2k^)

=|i^j^k^221632|

=i^10j^18k^ Unit vector perpendicular to both A and B

=i^10j^18k^12+102+182

=i^10j^18k^517



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