Calculating Force of Gravity in Circular Motion: Formula and Explanation

[Blassemer]

Ok,


How do I go about finding the Force of Gravity(N) in a circular motion problem.

My teacher is asking us to solve for that, so wat do I multiply to get that?

All I need is the formula to find Force of Gravity (N).

PS. I need it pretty quick because the Homework is do tomorrow.


Thanks.

 

[Pyrrhus]

the force of gravity? are you talking about a vertical circular motion?

 

[Blassemer]

Here is my problem...

It is about the planets and orbiting the sun, this is the planet earth

Radius=1.496x10^11
Period (years) = 1
Period (seconds)=31,536,000
Velocity=2.981x10^4
Centripetal Acceleration-5.94x10^-3
Force of Gravity (N)= ?
Mass (KG)=?
Centipetal Force (N)=?


I actually need to solve for those 3 things, if someone could give me the answer to those then that would be great because I have to do 8 other planets after this one so it would get me off to a good start, Thanks


if not the answer then a formula or something to find them (I really need to know how to find the Force of Gravity (N))

 

[Adrian Baker]

The centripetal force (mv^2/r) is supplied by Gravity F=Gmm/r^2

Sun mass = 2 x 10^30 kg if I remember correctly...

 

[Blassemer]

The centripetal force (mv^2/r) is supplied by Gravity F=Gmm/r^2

Sun mass = 2 x 10^30 kg if I remember correctly...

So, what does Gmm represent, I know r is radius but wat does Gmm mean

 

[Pyrrhus]

So, what does Gmm represent, I know r is radius but wat does Gmm mean

Constant of Gravity (NOT 9.8 m/s^2) and m1 and m2, are the masses of the two objects.