Question

a farmer moves along the boundary of a square field of side 10m in 40s.what will be the magnitude of displacement at the end of 2 minute 20 seconds from his initial position?

Answer 1

At first...
We convert time from min to sec....
We know that it takes 40sec to complete on around i.e. 0 displacement...
No dividing 140 by 40 we get 20 sec as the remainder...
Now we need to find the distance travelled in 20 sec...
Which is 20 m.
Now drawing a square the distance is 20 m but the displacement is diagonal .... i.e 10√2 which is obtained by pythagoras theorem....
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