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Physics

9th -

12thgrade

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Newton's 1st Law Quick Check

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10 questions

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  • 1. Multiple Choice
    45 seconds
    1 pt

    If an object remains at rest what must be true?

    The weight of the object must be zero.

    A friction force must act on the object.

    At least one normal or support force must act on the object.

    The sum of all forces acting on the object must be zero.

  • 2. Multiple Choice
    1 minute
    1 pt

    All the following statements are ALWAYS TRUE about an object that has zero acceleration EXCEPT one. Which statement might be false?

    The object is at rest.

    The object's velocity is constant.

    The net force acting on the object is zero.

    Any frictional forces acting on the object are balanced by equal and opposite forces.

  • 3. Multiple Choice
    45 seconds
    1 pt

    A skater glides across the ice in a straight line. To maintain her speed she must push against the ice every so often. The pushes are necessary because

    the ice is perfectly frictionless.

    she needs to maintain her state of zero acceleration.

    a small force is needed to overcome friction cause by sliding on the ice.

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