A 6.2 kg object undergoes an acceleration of 1.6 m/s 2 . What is the magnitude of the resultant force acting on it? Answer in units of N.

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Borys Shumyatskiy | College Teacher | (Level 3) Associate Educator

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Here we have to use Newton's Second Law of mechanics,


where `m` is a mass of an object, `F` is a net force of all forces acting on it, and `a` is a resulting acceleration.

This equation is true in a vector form (actually, `a` and `F` are vectors). And it is true in scalar form too, when `a` and `F` are the magnitudes of acceleration and force.

Now we can easily find the magnitude of the resultant force:

`F=ma=6.2*1.6` = 9.92 (N). This is the answer.

Newton (N) is the unit for force in SI. And yes, `N=kg*m*s^(-2).`