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A massive tractor is rolling down a country road, when a small sports car runs into...

  1. A massive tractor is rolling down a country road, when a small sports car runs into the machine at speed from behind; the sports car experiences a larger change in momentum than the tractor.

    (1) Yes

    (2) No

  2. A particle moving in a circle at constant speed has an acceleration of zero.

    (1) Yes

    (2) No

  3. An ice skater spins with her arms outstretched, then quickly pulls her arms in; her

    angular velocity decreases. (1) Yes
    (2) No

  4. It is possible to change the rotational kinetic energy of an object without changing its translational kinetic energy.

    (1) Yes (2) No

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