What is “In an isolated system two cars, each with a mass of 2,000 kg, collide. Car 1 is initially at rest , while car 2 was moving at 20 m/

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What is “In an isolated system two cars, each with a mass of 2,000 kg, collide. Car 1 is initially at rest , while car 2 was moving at 20 m/s. what is their combined momentum after the collision?”

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Ngọc Hoa 3 years 2021-08-30T01:47:35+00:00 1 Answers 7 views 0

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    2021-08-30T01:49:28+00:00

    Answer:

    Final velocity of the combining cars = 10m/s

    combined momentum = 40000kgm/s

    Explanation:

    Given the following :

    Mass of both colliding cars = 2000kg

    Initial Velocity of car 1 (U1) = 0

    Initial Velocity of car 2 (U2) = 20m/s

    Combuned momentum after collision =?

    This is an inelastic collision which is calculated thus :

    M1U1 + M2U2 = M1V + M2V

    M1U1 + M2U2 = (M1 + M2) V

    Where V = “final Velocity of the colliding bodies

    2000 × 0 + 2000 × 20 = (2000 + 2000) V

    0 + 40000 = 4000V

    V = 40000 / 4000

    V = 10m/s

    Therefore combined momentum = (M1 + M2) V

    (2000 + 2000) 10

    4000(10) = 40000kgm/s

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Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )