1.

A girl joos from one end A to other end B of a straight 250m road in 1min40sec. She then turn around and 50 m back to point C in 30sec. Find average speed and average velocity in jogging from A to C

Answer» TOTAL DISTANCE covered by girl(s) =250m+50m
=300m
total time TAKEN(t) =1min40sec+30sec
=130sec
average speed=s/t
=300/130
=2.307m/s
NOW,
DISPLACEMENT of girl=250m-50m
=200m
total time taken=130sec
average velocity=total displacement/total time taken
=200/130
1.53m/s


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