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Question

Joseph Jogs from one end A to the other end B of a straight 300 m road in 2 minutes 30 seconds and then turns around and jogs 100 m 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?

Solution
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From pont A to B
Distance covered=300m
Displacement=300m
Time taken=2 min 30 sec=(2×60)+30=150 sec
Average speed=Distance coveredTimetaken=300150=2 m/sec
Average velocity=DisplacementTimetaken=300150=2 m/sec
From point A to C
Distance covered=300+100=400m
Displacement=300100=200m
Time taken=3 min 30 sec=(3×60)+30=210 sec
Average speed=Distance coveredTimetaken=400210=1.90 m/sec
Average velocity=DisplacementTimetaken=200210=0.95 m/sec

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