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Two projectiles of identical mass are projected from the ground with same initial angle (α) with respect to earth surface and same initial velocity (u) in the same plane. They collide at the highest point of their trajectories and stick to each other. Which of the following statements is (are) correct?
  • a)
    The momentum of the combined object immediately after the collision is zero.
  • b)
    Kinetic energy is conserved in the collision.
  • c)
    The combined object moves vertically downward.
  • d)
    The combined object moves in a parabolic path.
Correct answer is option 'A,C'. Can you explain this answer?
Most Upvoted Answer
Two projectiles of identical mass are projected from the ground with s...
At highest point the vertical velocity of both objects is zero. They only have horizontal velocity, which is equal in magnitude and opposite in direction by given conditions. Also the mass is equal. So total momentum before collision is zero. As no external force is acting on system, momentum of combined object after collision is also zero. Hence option A is CORRECT. System has non zero initial horizontal kinetic energy. But final horizontal kinetic energy of combined mass is zero. So kinetic energy is not conserved. Option B is INCORRECT. Since momentum is zero combined object will fall under action of gravity in vertically downword direction. Hence option C is CORRECT. As C is correct option D is automatically incorrect.
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Two projectiles of identical mass are projected from the ground with same initial angle (α) with respect to earth surface and same initial velocity (u) in the same plane. They collide at the highest point of their trajectories and stick to each other. Which of the following statements is (are) correct?a)The momentum of the combined object immediately after the collision is zero.b)Kinetic energy is conserved in the collision.c)The combined object moves vertically downward.d)The combined object moves in a parabolic path.Correct answer is option 'A,C'. Can you explain this answer?
Question Description
Two projectiles of identical mass are projected from the ground with same initial angle (α) with respect to earth surface and same initial velocity (u) in the same plane. They collide at the highest point of their trajectories and stick to each other. Which of the following statements is (are) correct?a)The momentum of the combined object immediately after the collision is zero.b)Kinetic energy is conserved in the collision.c)The combined object moves vertically downward.d)The combined object moves in a parabolic path.Correct answer is option 'A,C'. Can you explain this answer? for IIT JAM 2024 is part of IIT JAM preparation. The Question and answers have been prepared according to the IIT JAM exam syllabus. Information about Two projectiles of identical mass are projected from the ground with same initial angle (α) with respect to earth surface and same initial velocity (u) in the same plane. They collide at the highest point of their trajectories and stick to each other. Which of the following statements is (are) correct?a)The momentum of the combined object immediately after the collision is zero.b)Kinetic energy is conserved in the collision.c)The combined object moves vertically downward.d)The combined object moves in a parabolic path.Correct answer is option 'A,C'. Can you explain this answer? covers all topics & solutions for IIT JAM 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Two projectiles of identical mass are projected from the ground with same initial angle (α) with respect to earth surface and same initial velocity (u) in the same plane. They collide at the highest point of their trajectories and stick to each other. Which of the following statements is (are) correct?a)The momentum of the combined object immediately after the collision is zero.b)Kinetic energy is conserved in the collision.c)The combined object moves vertically downward.d)The combined object moves in a parabolic path.Correct answer is option 'A,C'. Can you explain this answer?.
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