Question

An object with a mass of 5.0 kg accelerates 8.0 m/s2 when an unknown force is applied to it. What is the amount of the force?

Answer 1

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Explanation:

Since F=ma and all the units in the problem are rational (i.e., MKS system), just plug the values in and do the math. This sort of problem gets a lot trickier when the units are a mix of various systems. Anything with pounds is a harder since pounds aren’t mass. The English unit of mass is something called a slug. There is also lbf (pounds force) not to be confused with foot-pounds. The best advice I ever got was to avoid English units like they were an STD. I f you had to work with them, first convert to MKS (meters/kilograms/seconds), do the problem, and covert back.

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Answer 2

F=40kgm/s2

Explanation:

F=m.a

F=5kg×8m/s2

F=40kgm/s2 or 40 N