Centre of Mass 3 Question 12
15. A particle of mass is projected from the ground with an initial speed at an angle with the horizontal. At the highest point of its trajectory, it makes a completely inelastic collision with another identical particle, which was thrown vertically upward from the ground with the same initial speed . The angle that the composite system makes with the horizontal immediately after the collision is (2013 Adv.)
(a)
(b)
(c)
(d)
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Answer:
Correct Answer: 15. (a)
Solution:
- From momentum conservation equation, we have,
From Eqs. (i) and (ii)
Since both components of