An object travels 7.5 m/s toward the west . Under the influence of a constant net force of 5.2 kN, it comes to rest in 3.2 s. What is its ma

Question

An object travels 7.5 m/s toward the west . Under the influence of a constant net force of 5.2 kN, it comes to rest in 3.2 s. What is its mass?

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Phúc Điền 3 years 2021-07-28T12:25:50+00:00 1 Answers 77 views 0

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  1. diemkieu
    0
    2021-07-28T12:27:06+00:00
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    Answer:

    m = 2218.67 kg

    Explanation:

    It is given that,

    Initial velocity, u = 7.5 m/s

    Final speed of an object, v = 0 (at rest)

    Force, F = 5.2 kN

    Time, t = 3.2 s

    We need to find the mass of the object. Force acting on an object is given by :

    F = ma

    m is mass, a is acceleration

    F=\dfrac{m(v-u)}{t}\\\\m=\dfrac{Ft}{v-u}\\\\m=\dfrac{5.2\times 10^3\times 3.2}{0-7.5}\\\\m=2218.67\ kg

    So, the mass of the object is 2218.67 kg

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