Physics

11th -

12thgrade

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Momentum and Center of Mass

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11 questions

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  • 1. Multiple Choice
    2 minutes
    1 pt
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    An object of mass m =2 kg experiences a force as shown in the force-time graph. Over the 5 seconds, what is the total change in momentum?

    35 kg m/s

    70 kg m/s

    -35 kg m/s

    -70 kg m/s

    None of these

  • 2. Multiple Choice
    2 minutes
    1 pt
    Image

    A cannon is mounted on a cart, and carrying a cannonball. The total mass of the cart, cannon, and ball is M, and the cart is rolling with no friction at a velocity v in the positive x-direction as shown above. The ball, of mass m, is fired with a velocity of vball in the positive x direction. What is the velocity of the cart and cannon after the ball is fired?

    (Mv-mvball)/(M-mball)

    (Mv-mvball)/M

    (v-mvball)/mball

    (Mv+mvball)/(M-mball)

    (-Mv-mvball)/(M+mball)

  • 3. Multiple Choice
    1 minute
    1 pt

    In a laboratory experiment, a cart rolling frictionless across a table collides with a sensor that indicates both the net force acting on the cart during the collision and the time over which the collision occurred. Based on this information, one can calculate:

    the acceleration of the cart

    the momentum of the cart

    the mass of the cart

    the change in kinetic energy

    the change in momentum of the cart

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