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22 February, 15:16

3. A box weighs 300 N. A force of 20 N Will slide it across a floor at a constant speed. What is the mass of the box? What is the acceleration of the box?

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  1. 22 February, 15:24
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    The mass of the box, m = 30.61 Kg

    The acceleration of the box, a = 0.65 m/s²

    Explanation:

    Given that,

    The weight of the box, w = 300 N

    The sliding force acting on the box, F = 20

    Since the weight of a body is equal to the product of mass and displacement. The mass of the box is given by the relation

    m = w/g

    Substituting the given values in the above equation

    m = 300 / 9.8

    = 30.81 Kg

    Hence, the weight of the box is, w = 30.81 Kg

    Since the sliding force acting on the box is 20 N

    Therefore, acceleration

    a = F / m

    = 20 / 0.81

    = 0.65 m/s²

    Hence, the acceleration acting on the box, a = 0.65 m/s²
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