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22 July, 12:49

An object with a mass of 7.8 kg is pulled on a horizontal surface by a horizontal pull of 50 N to the right. The friction force on this object is 30 N to the left. What is the acceleration of the object? 0.16 m/s^2

10 m/s^2

2.6 m/s^2

6.4 m/s^2

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  1. 22 July, 16:31
    0
    2.6 m/s²

    Explanation:

    m = mass of the object = 7.8 kg

    Consider the right direction as positive and left direction as negative

    F = horizontal applied force towards right = 50 N

    f = frictional force acting towards left = - 30 N

    a = acceleration

    Force equation for the motion of the object is given as

    F + f = ma

    50 - 30 = (7.8) a

    a = 2.6 m/s²
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