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

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

Haryana PMTHaryana PMT 2004Motion in a Plane

Solution:

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

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