Question

A particle moves in a circle of radius R. In half the period of revolution ratio of average speed to average
velocity is
. .
.Thanh Du​

Answer 1

Answer:

π/2

Explanation:

Since,

1. Average velocity is defined as "The total displacement of a body in total time taken"
2. Average speed is defined as "The total distance of a body in total time taken"

Hence,

In half the period of revolution of a circle with radius (=R),

average speed= (πR/t) -----(1)

and,

average velocity=(2R/t) ------(2)

from equation (1) & (2),

ratio = (πR/t)/(2R/t)

= πRt/2Rt

= π/2

So, the ratio is π/2.