Tue November 29, 2011 By:

two particles start moving from same position on a circle of radius 20cm with speed 40 pi m/s and 36 pi m/s respectively in the same direction. find the time after which the particles will meet again ?

Expert Reply
Wed November 30, 2011
relative velocity of the fast particle wrt  the slow one=40?-36? =4? m/s
the circumference distance covered with this relative vel:
4?=2?R/T     T= time period of meeting
     =2?Rn      n= frequency
n=10 Hz
so after 1/10 sec they will again meet.
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