# Answer to Question #943 in Mechanics | Relativity for Claire

Question #943

In the absence of a gravitational field, you

could determine the mass of an object (of

unknown composition) by?

could determine the mass of an object (of

unknown composition) by?

Expert's answer

Using the second Newton's law we have

F = ma,

so if we know the force acting on the body and its acceleration, we always

can determine the mass of the object as the ratio of them:

m = F/a.

F = ma,

so if we know the force acting on the body and its acceleration, we always

can determine the mass of the object as the ratio of them:

m = F/a.

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