- #26

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To illustrate this issue using a mechanical example, consider the equation ##F = ma##. If an object of mass ##m## is at rest, then the net force acting on it must be zero. The acceleration is zero as well. If we tried to ascertain the mass from this information we get ##m = F/a = 0/0##, which is indeterminate. The mass is non-zero, non-infinite, but force (summation) and acceleration are both zero. With any "##y=mx##" type of equation this is applicable. Does this help?

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