Physics

12th

grade

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dynamics

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12 questions

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  • 1. Multiple Choice
    2 minutes
    1 pt

    Each diagram illustrates a pair of forces of equal magnitude.Which diagram gives an example of a pair of forces that is described by Newton’s third law of motion?

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  • 2. Multiple Choice
    2 minutes
    1 pt

    A helium atom of mass m collides normally with a wall. The atom arrives at the wall with speed v and then rebounds along its original path. Assume that the collision is perfectly elastic.

    What is the change in the momentum of the atom during its collision?

    zero

    0.5 mv

    mv

    2 mv

  • 3. Multiple Choice
    2 minutes
    1 pt

    A nucleus collides with a stationary nucleus in a vacuum. The diagrams show the paths of the nuclei before and after the collision.

    No other particles are involved in the collision.

    Which diagram is not possible?

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