Gravity and Circular motion

Always acting

it pulls us towards earth

Is responsible for the movements of earth, planets, solar systems, and galaxies

Is the weakest force of nature

Gravity acts in a straight line between objects

Gravitational forces act opposite of each other

Newton described gravitational force with one law and a simple equation

Is a Force Field ( it emanates around the whole body from the center of it

Newton's law is "universal" because gravity acts on everything throughout the entirety of the universe

The constant G= 6.67x10^-11. This tiny constant is why gravity is imperceptible between objects of normal size

F= G m₁m₂/r²

Henry Cavendish measured G within 1.2% of the currrently accepted value when he "weighed the earth" in 1798 nearly 100 years after newton published his theory

https://www.youtube.com/watch?v=jkjqrlYOW_0

after he performed the experiment they were were able to approximately measure earths mass with the newly found G and determined earths average density as well

Gravitational forces add together much like any other force to get a net force.

If we observe phenomenon like spring tides(enhanced) and Neap tides(smaller) we can see the effects of this concept