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Example 3. A boy runs from his house to the market 1 km away, he reachesthe market in 30 minutes. Seeing the market closed he at once runs back homeand stops after 15 minutes at his friend's house which is 0.5 km away from themarket. Calculate the average speed and magnitude of average velocity of the boyB.S.E.B. (M.P.), 2010]motiaccmotduring the whole journey.

Answer»

Averagespeed=totaldistance/totaltimetaken=1000+500/45*60m/s=1500/2700m/sec=0.55m/secAveragevelocity=totaldisplacement/totaltime=500/2700m/sec=0.185m/sec



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