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### 23 Cards in this Set

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 LAW OF UNIVERSAL GRAVITY DEFINITION -EVERYTHING PULLS ON -EVERYTHING ELSE IN A WAY THAT SIMPLY INVOLVES MASS AND DISTANCE -GREATER MASSES MEANS GREATER ATTRACTION (DIRECTLY PROPORTIONAL) -GREATER DISTANCE SEPRATING WEAKER ATTRACTION (INVERSELY PROPORTIONAL) LAW OF UNIVERSAL GRAVITY FORMULA FORCE IS PROPORTIONAL TO MASS1 x MASS2 ÷ DISTANCE² F = (m1)(m2) d² UNIVERSAL GRAVITATIONAL CONSTANT DEFINITION CHANGES THE LAW OF UNIVERSAL GRAVITATION FROM A PROPORTION TO AN EQUATION UNIVERSAL GRAVITATIONAL CONSTANT FORMULA -------------------- UNIVERSAL GRAVITATIONAL CONSTANT (G) MAGNITUDE 6.67 x 10ˉ¹¹N·m ²/kg² -MAGNITUDE OF G IDENTICAL OF FORCE BETWEEN PAIR OF 1kg MASSES 1 METER APART INVERSE SQUARE LAW DEFINITION -LAW RELATING THE INTENSITY OF AN EFFECT TO THE INVERSE SQUARE OF THE DISTANCE FROM THE CAUSE -GRAVITY, ELECTRIC, MAGNETIC, LIGHT, SOUND, RADIATION ALL FOLLOW THIS LAW INVERSE SQUARE LAW FORMULA INTENSITY ~ 1 - d² (d=BETWEEN CENTER MASS) 1 DISTANCE UNIT =1 AREA UNIT =1 LAYER THICK 2 UNITS OF DISTANCE =4 AREA UNITS =1/4 LAYER THICK 3 AREA UNITS =9 AREA UNITS =1/9 LAYER THICK INVERSE SQUARE LAW EXPLANATION d = DISTANCE BETWEEN 2 OBJECTS CENTER MASSES GREATER DISTANCE FROM EARTHS CENTER, LESS WEIGHT OF OBJECT OBJECT WEIGHS 1/4 AS MUCH, TWICE AS FAR AWAY FROM EARTH CENTER SPRING TIDES DEFINITION -SUN, EARTH, MOON ARE ALIGNED -TIDES DUE TO THE SUN AND MOON COINCIDE -HIGHER THAN AVERAGE HIGH TIDES -LOWER THAN AVERAGE LOW TIDES -FULL MOON NEAP TIDES DEFINITION -MOON IS HALFWAY BETWEEN A NEW MOON AND FULL MOON -SUN AND MOON TIDES CANCEL EACH OTHER -HIGH TIDES LOWER THAN AVERAGE -LOW TIDES ARE HIGHER THAN AVERAGE GRAVITATIONAL FIELD DEFINITION PROPERTIES OF SPACE SURROUNDING ANY MASSIVE BODY CAN BE CONSIDERED TO BE CHANGED IN A WAY THE ANOTHER MASSIVE BODY IN THIS AREA EXPERIENCES A FORCE GRAVITATIONAL FIELD INSIDE PLANET G AT SURFACE 1/4 DOWN WOULD BE 1/4 G 1/2 DOWN WOULD BE 1/2 G CENTER WOULD BE O G ACCELERATION WOULD DECREASE AS REACHED CENTER GRAVITATIONAL FIELD CAVERN IN CENTER OF PLANET G = 0 NO MATTER WHAT SIZE THE CAVERN WEIGHT DEFINITION FORCE THAT AN OBJECT EXERTS ON A CERTAIN SURFACE (OR, IF SUSPENDED, ON A SUPPORTING STRING) WHICH IS OFTEN, BUT NOT ALWAYS, DUE TO THE FORCE OF GRAVITY WEIGHTLESS DEFINITION BEING WITHOUT A SUPPORT FORCE, AS IN FREE FALL. BLACK HOLE DEFINITION A CONCENTRATION OF MASS RESULTING FROM GRAVITATIONAL COLLAPSE, NEAR WHICH GRAVITY IS SO INTENSE THAT NOT EVEN LIGHT CAN ESCAPE. WEIGHT DEFINITION FORCE THAT AN OBJECT EXERTS ON A CERTAIN SURFACE (OR, IF SUSPENDED, ON A SUPPORTING STRING) WHICH IS OFTEN, BUT NOT ALWAYS, DUE TO THE FORCE OF GRAVITY WEIGHTLESS DEFINITION BEING WITHOUT A SUPPORT FORCE, AS IN FREE FALL. BLACK HOLE DEFINITION A CONCENTRATION OF MASS RESULTING FROM GRAVITATIONAL COLLAPSE, NEAR WHICH GRAVITY IS SO INTENSE THAT NOT EVEN LIGHT CAN ESCAPE. WEIGHT DEFINITION FORCE THAT AN OBJECT EXERTS ON A CERTAIN SURFACE (OR, IF SUSPENDED, ON A SUPPORTING STRING) WHICH IS OFTEN, BUT NOT ALWAYS, DUE TO THE FORCE OF GRAVITY WEIGHTLESS DEFINITION BEING WITHOUT A SUPPORT FORCE, AS IN FREE FALL. BLACK HOLE DEFINITION A CONCENTRATION OF MASS RESULTING FROM GRAVITATIONAL COLLAPSE, NEAR WHICH GRAVITY IS SO INTENSE THAT NOT EVEN LIGHT CAN ESCAPE. UNIVERSAL GRAVITATIONAL CONSTANT EXPLANATION THE FORCE OF GRAVITY BETWEEN TWO OBJECTS IS FOUND BY: -MULTIPLYING THEIR MASSES -DIVIDE BY SQUARE OF DISTANCES BETWEEN CENTERS -MULT RESULT BY CONSTANT G.