Kinematics Question 3

Question: A truck travelling due north at 20 m/s turns west and travels at the same speed. The change in it’s velocity be [UPSEAT 1999]

Options:

A) 40 m/s N?W

B) 202 m/s N?W

C) 40 m/s S?W

D) 202 m/s S?W

Show Answer

Answer:

Correct Answer: D

Solution:

v1=20j^ and v2=20i^

Δv=v2v1=20(i^+j^)

|Δv|=202 and direction θ=tan1(1)=45 i.e. S?W



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