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20 July, 08:18

Laurie is moving a dresser with a mass of 250 kg. She does 126 J of work with a force if 14 N. How far does she move the dresser?

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Answers (2)
  1. 20 July, 10:08
    0
    Answer: 9 m

    Explanation:

    Work is said to be done when an unbalanced force causes displacement of the body.

    Force is the product of mass (m) and acceleration (a).

    Work = Force * Displacement

    ⇒W = F. s = ma. s

    It is given that mass of the dresser is, m = 250 kg

    work done, W = 126 J

    Force acting on the dresser, F = 14 N

    we need to find displacement, s

    ⇒126 J = 14 N * s

    ⇒ s = 126 J / 14 N = 9 m

    Hence, Laurie is able to move the dresser to about 9 m.
  2. 20 July, 10:13
    0
    9 m

    Explanation:

    When an object moves or displaces along the direction of the applied force application of force, it is said that work is done.

    We know the formula of work:

    Work = force x displacement

    where force = mass x acceleration

    So this formula can be further broken down to:

    Work = mass x acceleration x d

    Putting in the given values to get:

    126 = 14 x d

    d = 126/14

    d = 9 m

    Therefore, the dresser was moved by 9m.
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