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  4. A truck travelling due north at 20 ms-1 turns west and travels with same speed. What is the change in velocity?

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Q. A truck travelling due north at $ 20\,ms^{-1}$ turns west and travels with same speed. What is the change in velocity?

ManipalManipal 2003Motion in a Straight Line

Solution:

image
Change in velocity
$=\sqrt{(20)^{2}+(20)^{2}}$
$=20 \sqrt{2}$
along north-east or south-west