Total Distance
Average Speed = ----------------------------
Total time
Total displacement
Average velocity = -----------------------------
Total time
Here is a link to a video about Distance and Displacement
Distance:
Distance is a measure to find out how much area is covered by a moving body when it is travelled from one point to the other. It is a scalar quantity, which does not have direction. Only the magnitude is there in the case of distance. The given figure will explain about the distance.
Displacement:
Displacement is the shortest distance travelled by a body from one point to the other. It is a vector quantity. Which has both magnitude and direction. The displacement is illustrated by the given figure.
If a car travels 280 km at a speed of 70 km/hour then the time taken can be calculated.
Time = Distance/speed = 280/70 = 4 hours
If a man is running for 6 hours at a speed of 12 km/hr. How much distance will he travel after 6 hrs.
Distance = speed x time = 12x6 = 72 km
If a train travels 50 km in first 30 mins, then 40 km in the next 20 mins & in total it travels 150 km in 1 hour 30 mins. How long did it travel in the last 40 mins. What is its average speed?
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