Question

What will be the magnitude of displacement of the farmer at the end of 2 minutes 20 seconds from his initial position? Farmer takes 40 s to move along the boundary​

Answer 1

Answer:

Diameter of the circular path traversed by the farmer

Explanation:

As the time taken for one round along the boundary is known to be 40 s, displacement after each 40s is zero. So displacement after 120 s ( 2 mins) is 0 as well. However, 20 s still further, the father covers half the boundary and so the displacement is double the radius. If distance were asked it would be 7*pi*radius