Question
Wed July 13, 2011 By:

Joseph jogs from one end A to the other end B of a straight 300 m road in 2 minutes 50 seconds and then turns around and jogs 100 m back to point C in another 1 minute. What are JosephÂ’s average speeds and velocities in jogging (a) from A to B and (b) from A to C?

Expert Reply
Wed July 13, 2011
From point A to B,

Distance covered = 300 m
Displacement = 300 m
Time taken = 2 min 50 sec = (2 x 60) + 50 = 170 sec
 
 
 
From point A to C,
 
Distance covered = (300 +100)m = 400 m
Displacement = (300 - 100)m = 200 m
Time taken = 3 min 50 sec = (3 x 60) + 50 = 230 sec
 
 
 

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