vectors

Question: A plane is revolving around the earth with a speed of 100 km/hr at a constant height from the surface of earth. The change in the velocity as it travels half circle is



1) 200 km/hr
2) 150 km/hr
3) $100\,\sqrt 2 \,km/hr$
4) Zero
Solution: Explanation: Explanation
addition-subtraction-vectors

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