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During a circus performance, a 73.1-kg human cannonball is shot out of a 19.5-m-long cannon. If the human cannonball spends 0.921 s in the cannon, determine the average net force exerted on him in the barrel of the cannon.

  • Physics!! -

    His average speedm in the cannon is
    Vav = 19.5/0.921 = 21.17 m/s

    The exit velocity is twice that, or
    Vfinal = 42.35 m/s

    For the accleration,
    a = Vfinal/0.921s = 46.0 m/s^2

    The average force (in newtons) is the mass (in kg) times the acceleration.

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