Question

A farmer moves along the boundary of a square field of side 10
min 40 s. what will be the magnitude of displacement of the
farmer at the end of 2 minutes 15 seconds?​

Answer 1

Answer:

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Explanation:

Side of the square = 10 m

Perimeter of the square = 4×10 = 40 m

He completes 1 round in 40 s.

So, speed = 40/40 = 1 m/s

So, distance covered in 2 min 20 s or 140 s is = 140 × 1 = 140 m

Number of rounds of the square completed in moving through 140 m is = 140/40 = 3.5

In 3 rounds the displacement is zero. In 0.5 round the farmer reaches the diagonally opposite end of the square from his starting point.

Displacement = AC = (AB + BC ) = (100+100) = 10√2 m

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