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Newton’s Universal Law of Gravity Sir Isaac Newton ( did / did not ) discover gravity: g stands for: ________________________________ G is the universal ______________________. It is basically a conversion factor to adjust the number and units so they come out to the correct value. This is a universal constant so it is true everywhere. If the cannon ball was given enough ______________, it could go around the world before falling to Earth. This is called the ____________________and the cannon ball would be put into _________________ around earth. Newton theorized that the force of gravity between to bodies was dependent on ________________________________________________________________________________ Therefore: The Law of Universal gravitation States that EVERY OBJECT IN THE UNIVERSE ________________EVERY OTHER OBJECT IN THE UNOVERSE WITH A FORCE DIRECTED ALONG THE LINE OF THE CENTERS OF THE TWO OBJECTS THAT IS PROPORTIONAL TO THE _____________________________ AND INVERSELY PROPRTIONAL TO THE SQUARE OF THE ___________________________________________ Friction: always ______________ motion Can act on a surface or in the air (known as ___________ ____________) When you match friction, the net force becomes ________, and the object slides at a constant ________________________________. o The sum of the forces becomes zero. Why objects fall at the same rate: You must not only look at weight, but at mass. Pay attention to the F/m ratio; it will always equal ___________________________. Air drag will affect the rate of acceleration of objects because of _________________ and ____________________________________. Free fall= ________________________________ force in a vacuum, but _____________________ force in air. Downward force = weight- air drag ____________________ velocity: when air drag equals weight, therefore there is no more acceleration. The object no longer picks up speed and reaches its terminal speed. The terminal velocity is less with air drag.