Question

1) A person is moves along the boundary of a square field of side 10 m in 20 sec. What will
be the magnitude of displacement of that person at the end of 2 min 20 sec.​

Answer 1

Answer:

30m

Explanation:

Perimeter of Square = 4 x 10 = 40m

It covers 10 m in 20 sec so for 40 m = 20 x 4 = 80 sec

Time Taken for one round = 1 min 20 sec

After one Round Displacement will be zero

HENCE 2min 20sec - 1 min 20 sec = 1 min

After one Round it will take 1 min for person to stop

1 min = 60 sec

10 m = 20sec

So 10x3 = 60 sec

Hence Total displacement = 30m