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18 March, 10:34

In which of the following situations would the least work have been done?

A. A 100-N force lifts an object 3 m.

B. A 250-N force moves an object 1 m.

C. A 25-N force moves an object 8 m.

D. A 600-N force is applied to an object and moves it 0 m.

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  1. 18 March, 13:36
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    Work = (magnitude of the force) x (distance in the direction of the force)

    A 100-N force lifts an object 3 m. = = > (100 x 3) = 300 joules

    B. A 250-N force moves an object 1 m. = = > (250 x 1) = 250 joules

    C. A 25-N force moves an object 8 m. = = > (25 x 8) = 200 joules

    D. A 600-N force is applied to an object

    and moves it 0 m. = = > (600 x 0) = no work

    Winner! Least work.
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