Kinematics Question 288

Question: In an clockw it’se system [CPMT 1990]

Options:

A) $ 30{}^\circ $

B) $ 45{}^\circ $

C) $ 60{}^\circ $

D) $ 90{}^\circ $

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Answer:

Correct Answer: B

Solution:

$ |\vec{A}\times \vec{B}|=\vec{A}.\vec{B} $ therefore $ AB\sin \theta =AB\cos \theta $ therefore $ \tan \theta =1 $

$ \theta =45{}^\circ $



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