akerkarprashant
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- F=m*a equation
Why F=m*a i.e product or multiplication and not F=m+a? i.e addition or summation?
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Because Newton's first law says that ##a = 0##, when ##F = 0##.akerkarprashant said:Summary:: F=m*a equation
Why F=m*a i.e product and not F=m+a? i.e addition?
Because it predicts that a 9.81 kg mass would float in midair if released at a point near the Earth's surface where the acceleration of gravity is -9.81 m/s2. Don't try this at home.akerkarprashant said:Summary:: F=m*a equation
Why F=m*a i.e product or multiplication and not F=m+a? i.e addition or summation?
You can mutiply pretty much any two quantities. If they are both vectors you need to use the dot product or the cross product.akerkarprashant said:Thanks.
So we can add Scalar + Scalar, Vector + Vector but not Scalar + Vector quantity?
While Scalar * Scalar, Vector * Vector and Scalar * Vector quantity is possible?
Indeed. What is one second more than one kilogram? It doesn't make sense. But one second times one meter per second gives you one meter, the distance traveled in the time.PeroK said:You can only add quantities that have the same units. E.g. if both have units of mass; or, if both have units of mass times length divided by time squared. Etc.
Is this the infinite monkey theorem applied to theoretical physics?akerkarprashant said:[...]
F=m^a
F=m/a
[...]
It reminds me of the old Sidney Harris cartoon ##\dots##jbriggs444 said:Is this the infinite monkey theorem applied to theoretical physics?
Because force is proportional to mass: If you have twice as much mass, you have to push twice as hard to accelerate it at the same rate.akerkarprashant said:Why F=m*a
With that, we will close this thread. Thank you everybody for trying to help the OP.vanhees71 said:The answer is that Newton was after figuring out how nature works and not after writing down mathematical expressions which don't make any sense!