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21 October, 14:49

If the net work done on an object is positive, what can you conclude about the object's motion?

- The object is moving with a constant velocity.

- The object is speeding up.

- The object is slowing down.

- The object is at rest; its position is constant.

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  1. 21 October, 18:23
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    Since there is a positive work on an object, this directly indicates that there is an increase in Energy on the body.

    Work can be expressed in terms of Force and distance as

    W = Fd

    Where,

    F = Force

    d = Distance

    The force in turn is a description of how mass accelerates according to Newton's second law, that is

    F = ma

    The mass (m) remains constant, but the acceleration (a) is constant, which implies directly that there is a gradual change in the velocity of the object.

    Therefore the correct answer is: The object is speeding up.
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