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?
From pont A to B
Distance covered=300mDisplacement=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=300−100=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