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Three objects A, B and C
are kept in a straight line on a frictionless horizontal surface. These have masses m, 2m and m, respectively. The object A moves towards B with a speed 9 m/s and makes an elastic collision with it. Thereafter, B makes completely inelastic collision with C. All motions occur on the same straight line. Find the final speed (in m/s) of the object C.
    Correct answer is '4'. Can you explain this answer?
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    Three objects A, B and Care kept in a straight line on a frictionless...
    The law of conservation of momentum is valid for all collisions.
    For elastic collision, conservation of energy is also valid.
    In addition for elastic collision,
    u1 = u2 = (v1 - v2)
    In this case, the second ball is at rest.
    Initially, u1 = 9 ms-1, u2 = 0
    mA will recoil back and 2m (B) will go forward.
    B is moving with 6 ms-1 to make an inelastic collision with C.
    Conservation of momentum gives
    2m x 6 + m x 0 = (2m + m) vc
    ∴ vC = 12/3 = 4 ms-1
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    Three objects A, B and Care kept in a straight line on a frictionless horizontal surface. These have masses m, 2m and m, respectively. The object A moves towards B with a speed 9 m/s and makes an elastic collision with it. Thereafter, B makes completely inelastic collision with C. All motions occur on the same straight line. Find the final speed (in m/s) of the object C.Correct answer is '4'. Can you explain this answer?
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    Three objects A, B and Care kept in a straight line on a frictionless horizontal surface. These have masses m, 2m and m, respectively. The object A moves towards B with a speed 9 m/s and makes an elastic collision with it. Thereafter, B makes completely inelastic collision with C. All motions occur on the same straight line. Find the final speed (in m/s) of the object C.Correct answer is '4'. Can you explain this answer? for JEE 2024 is part of JEE preparation. The Question and answers have been prepared according to the JEE exam syllabus. Information about Three objects A, B and Care kept in a straight line on a frictionless horizontal surface. These have masses m, 2m and m, respectively. The object A moves towards B with a speed 9 m/s and makes an elastic collision with it. Thereafter, B makes completely inelastic collision with C. All motions occur on the same straight line. Find the final speed (in m/s) of the object C.Correct answer is '4'. Can you explain this answer? covers all topics & solutions for JEE 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Three objects A, B and Care kept in a straight line on a frictionless horizontal surface. These have masses m, 2m and m, respectively. The object A moves towards B with a speed 9 m/s and makes an elastic collision with it. Thereafter, B makes completely inelastic collision with C. All motions occur on the same straight line. Find the final speed (in m/s) of the object C.Correct answer is '4'. Can you explain this answer?.
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