a cannon sits on a stationary railroad flatcar with a total mass of 1000 kg. when a 10 kg cannonball is fired to the left at a speed of 50 m

Question

a cannon sits on a stationary railroad flatcar with a total mass of 1000 kg. when a 10 kg cannonball is fired to the left at a speed of 50 m/s, what is the speed of the flatcar

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Hưng Khoa 4 years 2021-08-14T09:38:55+00:00 1 Answers 43 views 0

Answers ( )

  1. thienthanh
    0
    2021-08-14T09:40:46+00:00
    Reply

    Answer:

    0.5 m/s

    Explanation:

    From Newton’s Third law of motion,

    Momentum of the cannon = momentum of the flatcar.

    mv = MV…………………… Equation 1

    Where m = mass of the cannon, v = velocity of the cannon, M = mass of the flatcar, V = Velocity of the flat car.

    make V the subject of the equation

    V = mv/M………………. Equation 2

    Given: m = 10 kg, v = 50 m/s, M = 1000 kg

    Substitute into equation 2

    V = 10×50/1000

    V = 500/1000

    V = 0.5 m/s

    Hence the speed of the flatcar = 0.5 m/s

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