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A bird flies 6 km towards east, and then flies 8 km towards north. If the magnitude of its average velocity for the entire motion is 15 m/s, find its average speed during this period. |
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Answer» 21 m/s Explanation: here displacement = SQRT( 8^2+6^2)=10 time taken= 10/15=2/3 s average speed=distance travelled / time taken distance travelled= 6+8=14 m avg speed= 14/(2/3)=14*3/2=21 m/s |
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