February 26, 2017

Homework Help: physics

Posted by physics on Saturday, September 12, 2009 at 7:22pm.

we can say that the force of gravity is equal to mass times acceleration were the acceleration is equal to gravity sense gravity is an acceleration because of newtons second law force = mass times acceleration

hence Fg = mass times acceleration
Fg = mass times gravity

Fg = mg

however newtons second law states that the net force acting on an object is equal to it's mass times it's acceleration so what allows us to say that

Fg = mg
because certainly not for every single situation the

net forc is going to equal to the force of gravity

please explain...

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