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A force of 5 N is acting on an object. T...

A force of 5 N is acting on an object. The object is displaced through 2 m in the direction of the force (Fig. 11.2). If the force acts on the object all through the displacement, then work done is `5 N xx 2 m =10 N` m or `10 J`.

Text Solution

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The correct Answer is:
A
`W = Fs = (5N)xx(2m) = 10J`
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Knowledge Check

  • A force of 10N is acting on an object. The object is displaced through 5m in the directino of force. Then the work done is:

    A
    `-50J`
    B
    50J
    C
    `-50N`
    D
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  • How much work is done by a force of 10 N in moving an object through a distance of 1 m in the direction of the force ?

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    B
    `100 J`
    C
    `15 J`
    D
    `10 J`

  • A force of 20 N acts on a body and the body moves through 1 m at an angle of 45^(@) in the direction of the force. The work done by the force is

    A
    `10 sqrt(2)` J
    B
    `(10)/(sqrt(2)) ` J
    C
    `- 10 sqrt(2) ` J
    D
    `(-10)/(sqrt(2)) ` J

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    A force of 7 N acts on an object. The displacement is, say 8 m, in the direction of the force (see Figure below). Let us take it that the force acts on the object through the displacement. What is the work done in this case ?

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