Find gravitational force

In summary, the gravitational force acting on a person due to another person standing 2 meters away is 5.8*10^-8N, assuming each individual has a mass of 59kg. The equation used to calculate this force is Fg=G*(m1m2)/r^2, where G is the gravitational constant.
  • #1

Homework Statement


what is the gravitational force acting on a person due to another person standing 2 meters away? assume each individual has 59kg mass.


Homework Equations


looks like i tried to use w=mgy
but that was wrong.
with that you get like 1156.4

The Attempt at a Solution


the answer is 5.8*10^-8N but idk how to get it
 
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  • #2
Look up Newton's law of universal gravity. (W = mg is the weight of a body near the Earth's surface--the gravitational attraction between the Earth and the body. You want the force between the two bodies.)
 
  • #3
so Fg=G* (m1m2)/r^2 is g 9.8 or fg?
 
  • #4
physicsgurl12 said:
so Fg=G* (m1m2)/r^2
That's the correct equation. But there's no 'g' in that equation. What you need is the gravitational constant G. (Look it up.)
 
  • #5
its 6.673*10^-11 thanks i got it now
 

1. What is gravitational force?

Gravitational force is the attractive force between two objects with mass. It is responsible for keeping objects, like planets, in orbit around larger bodies, such as stars.

2. How is gravitational force calculated?

The force of gravity between two objects is calculated using the equation F = (G*m1*m2)/r^2, where G is the universal gravitational constant, m1 and m2 are the masses of the two objects, and r is the distance between them.

3. What factors affect gravitational force?

The strength of gravitational force is affected by the masses of the two objects and the distance between them. The greater the masses of the objects, the stronger the force will be. The farther apart the objects are, the weaker the force will be.

4. How does distance affect gravitational force?

Gravitational force follows the inverse square law, which means that as the distance between two objects increases, the force between them decreases exponentially. This means that if the distance between two objects doubles, the force between them will decrease by a factor of four.

5. What is the relationship between gravitational force and weight?

Gravitational force is directly related to weight. Weight is a measure of the force of gravity on an object, so the greater the force of gravity on an object, the greater its weight will be. This is why objects weigh less on the moon, where the force of gravity is weaker, than they do on Earth.

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