A particle of mass 'm' is projected from the ground with an initial speed u0 at an angle 'a' with the horizontal. At the highest point of its trajectory, it makes a completely inelastic collision with another particle of mass which was thrown vertically upward from the ground with the same initial speed u0. The angle that the composite system makes with the horizontal immediately after the collision is _.
Correct answer: A. 37˚
- A. 37˚
- B. 45˚-a
- C. 45˚+a
- D. 90˚
Explanation
Option A is correct since by applying the formula shown in the picture of v1 and v2. We have to compare v1 and v2, then we will know the answer.
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About Collisions
Collisions involve the conservation of linear momentum when bodies interact for a short time. The topic covers impulse, elastic and inelastic collisions, kinetic energy changes, and the coefficient of restitution, with calculations usually based on one dimensional motion. Momentum remains conserved in isolated collisions, but kinetic energy is conserved only in elastic collisions.
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