Question

Find average speed and average velocity for the given below

A Man walks 500m on a straight road in 10min and return along the same path in

20minutes

An athlete walks around a square field of side 10m in 20minutes. If he completes 3

rounds taking same time in each round

Roma walks 600m along a straight road from home to market in 2 minutes and

returns along the same straight road 300m in 1 minute​

Answer 1

Answer:

Here, Side of the given square field = 10m

so, perimeter of a square = 4*side = 10 m * 4 = 40 m

Farmer takes 40 s to move along the boundary.

Displacement after 2 minutes 20 s = 2 * 60 s + 20 s = 140 seconds

since in 40 s farmer moves 40 m

Therefore, in 1s the distance covered by farmer = 40 / 40 m = 1m

Therefore, in 140s distance covered by farmer = 1 � 140 m = 140 m. Now, number of rotation to cover 140 along the boundary= Total Distance / Perimeter

= 140 m / 40 m = 3.5 round

Thus, after 3.5 round farmer will at point C of the field.

Thus, after 2 min 20 seconds the displacement of farmer will be equal to 14.14 m north east from initial position