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29 June, 10:17

Choose the situation below in which the force applied is the greatest.

A) Steve put in 50 J of work moving a box 50 meters.

B) Doing 400 J of work, Penny pushed her cat 80 meters.

C) Samantha did 365 J of work dragging a wagon across 73 meters of lawn.

Eliminate

D) Clark pushed a crate from the chair, 16 meters across the room, doing 144 J of work.

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  1. 29 June, 13:16
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    maximum work is done in the case

    D) Clark pushed a crate from the chair, 16 meters across the room, doing 144 J of work.

    Explanation:

    As we know that the Work done is product of force and displacement

    So we have

    A) Steve put in 50 J of work moving a box 50 meters.

    So here we have

    50 = F. 50

    F = 1 N

    B) Doing 400 J of work, Penny pushed her cat 80 meters.

    So here we have

    400 = F. 80

    F = 5 N

    C) Samantha did 365 J of work dragging a wagon across 73 meters of lawn.

    So here we have

    365 = F. 73

    F = 5 N

    D) Clark pushed a crate from the chair, 16 meters across the room, doing 144 J of work.

    So here we have

    144 = F. 16

    F = 9 N

    So maximum work is done in the case

    D) Clark pushed a crate from the chair, 16 meters across the room, doing 144 J of work.
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