-->

Motion In Straight Line

Question
CBSEENPH11016975

A particle covers half of circle of radius r in time t. Show that ratio of distance travelled to magnitude of displacement is numerically equal to right angle in radian.

Solution

Given, 
Radius of the circle = r 
Distance covered = half of the circle =  πr

Magnitude of displacement is 2r. 

  DistanceDisplacement=πr2r=π2, which is also numerically eqal to right angle in radian.