F ORCES OF F LIGHT Sectional Review

4 F ORCES OF FLIGHT Lift Thrust Weight Weight (Gravity x Mass) Drag

4 F ORCES OF FLIGHT Lift Thrust Weight Weight (Gravity x Mass) Drag

W HAT ’ S ARE F ORCES ? Gravity Weight Drag Lift Thrust Buoyancy

M ASS AND W EIGHT Mass The amount of Matter in a substance Plain English – How much stuff is inside something Measured – kg or g (pounds for old fogies) Formula – Get on a Scale Weight The Gravitational Pull on an Object Plain English – How much does Gravity pull you on the ground Measured – N (Newtons) Formula – Mass x Gravity

D ENSITY Associated with Mass Mass – How much stuff is in something Density is one step beyond – it want to know how big that something is. Density – How much stuff is inside of a given size object Measured – g/cm3 or kg/m3 Formula – mass x volume

D ENSITY Density – Mass x Volume Mass – Measure on a Scale – g or kg Volume – The 3D size of an object Area – 2D size of an object – so it is just adding one more side to the object Length x Width = Area Length x Width x Height = Volume

D ENSITY OF A IR The Hot Air inside the balloon makes the air particles spread apart from each other Since the particles are over a bigger volume it is less dense. Less Dense Air Rises up

D ENSITY O F A IR P ARTICLES

D ENSITY OF A IR Less Dense Air Rises up Gravity Buoyancy

B ERNOULLI ’ S P RINCIPLE

Air Pressure Travels from High to Low As Air speeds up it loses pressure

B ERNOULLI ’ S P RINCIPLE