Question

A particle A is projected with speed VA from a point making an angle 60° with the horizontal. At the
same instant, second particle B (lie in the same horizontal plane) is thrown vertically upwards from a
point directly below the maximum height point of parabolic path of A, with velocity Vs. If the two
particles collide then the ratio of VN, should be:
(A) 1
(B) 21/3
(C) 1312
(D) 13​

Answer 1

Answer:

VA/Vs  = 2/ √3

Explanation:

A particle A is projected with speed VA from a point making an angle 60° with the horizontal. At the

same instant, second particle B (lie in the same horizontal plane) is thrown vertically upwards from a

point directly below the maximum height point of parabolic path of A, with velocity Vs

VA  making an angle 60° with the horizontal

Horizontal Speed = VA Cos60 =

Vertical Speed = VA Sin 60  = VA √3 / 2

particle B Vertical Speed = Vs

VA √3 / 2 = Vs

=> VA/Vs  = 2/ √3