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# 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?

Answer :

(a) Given, distance covered from point A to point B = 300 meters

Time taken to travel from point A to point B = 2 minutes and 30 seconds = 150 seconds

Displacement from A to B = 300 meters

We know that, Average speed
= $$\frac{distance}{time taken}$$

Therefore, the average speed while travelling from A to B = $$\frac{300}{150}$$ = 2 m/s

and, Average velocity = $$\frac{displacement}{time taken}$$

Average velocity while travelling from A to B = $$\frac{300}{150}$$ = 2 m/s

(b) Distance covered from point A to point C = 300m + 100m = 400 meters

Time taken to travel from point A to point C = 2 min 30 secs + 1 min = 210 seconds

Displacement from A to C = 300m – 100m = 200 meters

Similarly, Average speed while travelling from A to C = $$\frac{400}{210}$$ = 1.9 m/s

Average velocity while travelling from A to C = $$\frac{200}{210}$$ = 0.95 m/s