KinematicsHard
Question
A particle a is projected with speed with speed vA from a point making an angle 60o with the horizontal. At the same instant, a second particle B is thrown vertically upward from a point directly below the maximum height point of parabolic path of A with velocity vB. If the two particles collide then the ratio of vA / vB should be : -
Options
A.1
B.
C.
D.√3
Solution
At maximum height vertical component of velocity becomes zero.
v2 = u2 + 2as
For A : 0 = vA2 sin2 60o - 2gh
2gh = vA2 sin2 60o = vA2 (3/4)
VA =
For B : 0 = VB2 2gh
vB =
; 
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