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12 December, 13:38

Which of the following must occur in order for work to be done?

A. The object must use a machine.

B. The object must move.

C. The object must make another object move.

D. The object must not move.

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Answers (1)
  1. 12 December, 15:21
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    When a force is applied to an object makes the object to move, work is done by the force.

    force is exerted and the object moves a distance d in a direction other than the direction of the force, less work is done than if the object moves a distance d in the direction of the applied force.

    w=fdcos theta

    B. The object must move.
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