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6 January, 19:01

A nonzero net force acts on a particle and does work. Which one of the following statements is true?

A. The kinetic energy of the particle changes, but the speed of the particle does not change.

B. The kinetic energy of the particle changes, but the velocity of the particle does not change.

C. The kinetic energy and the speed of the particle change, but the velocity of the particle does not change. The kinetic energy, speed, and velocity of the particle change.

D. The kinetic energy of the particle does not change, but the speed of the particle does change.

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Answers (1)
  1. 6 January, 21:20
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    option (D) is correct.

    Explanation:

    According to the work energy theorem, the work done by all forces is equal to the change in kinetic energy of the body.

    the kinetic energy of a body is directly proportional to the square of the speed of the body.

    As the kinetic energy change, the speed of the body also change.

    Option (D) is correct.
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