Kinematics Question 452

Question: A vector a it’s turned without a change in it’s length through a small angle dθ . The value of |Δa| and Δa are respectively

Options:

A) 0,adθ

B) a,dθ,0

C) 0, 0

D) None of these

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Answer:

Correct Answer: D

Solution:

[d] |Δa|=a2+a22.a.a.cos(dθ) =2asin(dθ2)

For small angle sindθ2dθ2

|Δa|=2a×dθ2=a.dθ



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