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# need of constants??? Watch

1. I want to ask why we need constants? Is it that we are forgetting something to consider or what.
And also due to these constants gravitational force is weaker thsan electric force. PLs answer.
2. (Original post by 1DA)
I want to ask why we need constants? Is it that we are forgetting something to consider or what.
And also due to these constants gravitational force is weaker thsan electric force. PLs answer.
We need constants so as to make the mathematical descriptions of natural phenomena consistent with actual reality, because we cannot arrive at the results by deductive reasoning, that is, reasoning without appeal to experience. Hence, in the case of classical gravitational force formula, so long as we know that the force is proportional to the product of the masses and inversely proportional to the distance square between the- whose derivations are also aided by experimental astronomical results conducted by Kepler and other astronomers before him, we give space for a constant in the formula so that when we carry out an experiment (whose purpose is to get the constant itself) concerning the gravitational force between two masses, the constant allows the formula to hold good when the same experiment is carried out again. As a result, it is also important to realise that it is only assumed that the formula will hold good at all times in the future with the data beyond the scope of the ones used during the experiment.

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