A box is accelerated from rest along a frictionless surface by a net force of 100N. It covers 40 metres in 5 seconds. Find the mass of the b

Question

A box is accelerated from rest along a frictionless surface by a net force of 100N. It covers 40 metres in 5 seconds. Find the mass of the box.

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Nguyệt Ánh 4 years 2021-08-27T04:56:00+00:00 1 Answers 112 views 0

Answers ( )

  1. Maris
    0
    2021-08-27T04:57:46+00:00
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    Answer: 31,25

    Explanation:

    F=  100

    F=ma

    a=?

    x = 40

    Vo = 0

    We have to evaluate a :

    x = Vot + \frac{1}{2}at^2\\\\40=0+\frac{1}{2}a(5^2 )\\\\80=25a\\\\3,2=a

    The force formula :

    F=ma

    100=m*3,2\\\\31,25=m

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