Question

a man goes around a circular field of diameter 21 metre in 30 second find his displacement in 2 min 15 seconds​

Answer 1

Answer:

GIVEN

Diameter of feild = 21 m

TO FIND – DISPLACEMENT IN 2MIN 15 SEC

SOLUTION

$radius = \frac{diameter}{2}$

thus radius = 10.5

$perimeter = 2\pi \: r$

perimeter = 2*3.14*10*5

= 65.94

Means the person is able to cover 130 m in 1 minute

so total distance coverd in 2 min is 260 m

and 33m in 15 sec

so total distance covered is 293 m

Displacement is only 33 m as 2πr = 0 displacement

so distance covered in 15 sec is displacement

Answer 33 metre