Don’t Let Gravity Get You Down Lee Ann DeHaas & Pam Trobiano

Newton’s Ideas of Gravity Depended on mass and distance The greater the mass of an object, the stronger the gravitational pull The closer the objects, the stronger the gravitational pull His laws held true most of the time

Einstein’s Ideas of Gravity 20 th century or 250 years after Newton Newton’s ideas of gravity fell short when trying to explain large and distant objects Expanded upon Newton’s Laws and called it the Theory of Relativity, especially general relativity. General relativity can effect space and time

Einstein’s Ideas of Gravity Cont. Space and time are interconnected and can be a fourth dimensional thing called “spacetime” Massive objects can bend “spacetime” around them

Gravity All objects have their own gravitational pull Has to do with Newton's third law which states that for every action there is an equal and opposite reaction Example: if you push on a wall with 5N of force, the wall pushes back with the same amount of force.

Gravity on Planets Mass is not the same as weight Mass is a measure of the matter IN an object Weight is a measure of gravity ON an object The force of gravity depends on how large the planet is- the greater the mass of the planet the stronger the gravity.

Activities Marble Demonstration Weight on other planets Brain Pop

What’s Your Weight? Solve for your weight on the following planets/celestial bodies using the equations: Mercury Weight = Your Weight *.37 Moon Weight = Your Weight *.16 Jupiter Weight = Your Weight * 236 Pluto Weight = Your Weight *.67 Sun Weight = Your Weight * 2,707

Assessment Q and A discussion Graphic Organizer