A car travels a distance of 200km along a straight road ar speed of 40km/h. The car returns back to same location with speed of 60km/h. Find the average speed and the average velocity of the car for the entire journey.
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Explanation:
Let point x be the starting point and y be the destination
So,
time taken to travel from x to y =
200km/40km/h
=5 hours
time taken to travel from y to x =
200km/60km/h
=10/3 hours
Average speed =
Total distance travelled/Total time taken
= 200 + 200/5 + 10/3
= 400/25/3
= 48 km/h
Average velocity =
0 since displacement is also 0
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