relative motion

please anyone explain this problem

three points are located atthe vertices of an equilateral triangle whose is a.They all start moving simultaneously with velocity v constant in modulus,with the first point heading for the second, the second for the third, and the third for the first. how soon will the converge

1 Answers

62
Lokesh Verma ·

This is a very standard question.

The relative speed of the first body with respect to the one it is chasing along the line of their motion is v(-1-cos60) (This is the crucial step!)

3v/2= s/t

distance along the direction covered is a

time taken is 2a/3v

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