Question

A body completes one round of a circle of radius R in 20 seconds. What is the ratio of distance to displacement of the body after 10 seconds

Answer 1

Answer:

Explanation:

given the body completes a full revolution in 20 seconds

2*pi *r =20 seconds [circumfrence of circle]

therefore distance travelled in 10 seconds=2*pi*r*10/20=pi*r=half of the circle

therefore distance travelled in 10 sec=pi*r

displacement in 10 sec=2r [diametrically opposite points]

therefore ratio=pi*r/2r=pi/2

                      =3.14/2=1.57