An object goes from point X to Y along a straight path and covers 500m in 1 minutes and 40 second and then comes back from Y to Z covering 200 m in 35 sec. Find the displacement, average speed and average velocity​

Displacement 300m

Average speed 5.19m/s

Average velocity 2.22m/s

Explanation:

Assume X, Y and Z are all in the same line.

(1) Displacement is a distance in a defined direction. Moving 500m to Y (a defined direction) and back by 200m , actually move by 300m only in direction Y.

(2) Speed is a measure of total distance travelled in a specified period of time.

Total distance travelled is 500 + 200 = 700m

Total time spent for the whole trip is 1 min 40 sec + 35 sec = 135 sec

So the Average speed is 700/135 = 5.19 m/s

(3) Velocity is the speed in a defined direction

since Displacement = Velocity x time

where Displacement is 300m

Time = 135 sec

so Velocity = 300/135 = 2.22 m/s

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