Question

A player moves along the boundary of a square ground of side 30 m in 120 sec.The magnitude of displacement of the farmer at the end of 7 minutes from his initial position is​

Answer 1

Hi friend,

Total distance covered 10m in 40sec

Total time taken= 2min 20sec= 140sec

Total round completed = 140/40=3.5 rounds

So If an object moves from A to D, the shortest path will be from A to C. So displacement is AC, that we will find by phythogoras theorem.

AC2= AB2 +BC2 

AC2= (10)2 +(10)2

AC2= 100+100

AC2=200

AC = (200)1/2

 

AC= 10× (2) ½ 

Hope it helps......

in same way u can do this one