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Joseph jogs from one end a to the other end b of a straight 300m road in minutes 30 seconds and then turns around and jogs 100m back to point c in another 1 minute.what are joseph's average speeds and velocities in jogging (a) from a to b and (b) from a to c |
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Answer» ont A to B Distance COVERED=300m Displacement=300m TIME taken=2 MIN 30 sec=(2×60)+30=150 sec Average SPEED= Timetaken Distance covered = 150 300 =2 m/sec Average velocity= Timetaken Displacement = 150 300 =2 m/sec From point A to C Distance covered=300+100=400m Displacement=300−100=200m Time taken=3 min 30 sec=(3×60)+30=210 sec Average speed= Timetaken Distance covered = 210 400 =1.90 m/sec Average velocity= Timetaken Displacement = 210 200 =0.95 m/secnswer |
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