UNIT 5 UNIVERSAL GRAVITATION Simplified Notes GRAVITY IS

UNIT 5 - UNIVERSAL GRAVITATION Simplified Notes

GRAVITY IS UNIVERSAL The moon is “constantly falling around the Earth. ” It has velocity that keeps it moving in an orbit instead of crashing into the Earth. Johannes Kepler – Came up with the laws of planetary motion. He described HOW the planets moved, but not WHY. Newton explored the WHY. He decided that there has to be a force (GRAVITY) that keeps the planets moving in their elliptical orbits.

GRAVITY IS UNIVERSAL

USING THE LAW OF UNIVERSAL GRAVITATION – CALCULATOR TIPS

EXAMPLE: FINDING THE GRAVITATIONAL FORCE OF THE EARTH ON THE MOON

USING THE LAW OF UNIVERSAL GRAVITATION – CALCULATOR TIPS You can put the whole thing in at once or separate it into 2 steps. DON’T FORGET to square d! Try the example problem in your calculator right now and make sure you understand how to get the right answer. Ask your classmates for help if you are having trouble. 1 Step 2 Steps

PRACTICE PROBLEM – TRY BEFORE RECEIVING HW Joe (mass 95 kg) and Sue (mass 67 kg) are a mean distance of 0. 75 m away from each other. Calculate the gravitational force that each of them exerts on the other. When you think you have the answer, take it up to the teacher. If it is correct, he or she will give your homework!