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67 Cards in this Set

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 What are the two downward forces acting upon your rocket? Drag, and thrust This law says, "the faster a fluid moves, the lwer pressure it exerts" Bernoullis principle If you were doing a rough sand job which sand paper would you use? 100 If you were doing a final sanding what sandpaper would you use? 600 The Engine is responsible for producing what force acting on a rocket? thrust The fins are resposible for producing what major force acting on a rocket? lift Would the rocket go higher or lower if it was in a tank of vacaline then if it was in an archer field lower The force that pulls down on the mass of any object near the earth though its center of gravity... Gravity Which sides do you sand the leading edge and the tip Which side do you tapper? Trailing edge What is a speed at any given moment? instantanious speed Which law states "energy cannnot be created or destoryed, it may be transfored from one form to another.." Law of concervation What does a horiontal line, anywhere but the origin, on a velocity vs. time graph represent? moving at a constant spped What can potential energy be stored in? food, fuelm stretchinG a rubber band, compressing a spring What does the slope of the curve on a distances vs. time represent? speed speed= distance/time time= distance/speed distance= speed*time acelleration= v2-v1/T velocity= distonce/time If the direction and speed are constance then it has a _________. Constant velocity The ttal distance divided by time interval is the___. average speed When you look at the cars speedometer you see the____. instantaeous speed Linear motion is______. motion along a straight line which axis is the dependent variable y axis which axis is the independent variable? X axis What is acceleration? the rate at which velocity is changing what is rate quality/time Relative in regard to.. Changing Velocity either the change in speed or direction ex. a curvy road Explan Newtons law fo momentom conservation mementom remains constant, it is never created or destroyed Explain newtons law of intertia (1st law) rests tends to stay at rest, motion stays in motion explain Newtons 2nd law forces acts on a body, it is acclerated in the direction of the force Explain newtons 3rd law (action and reaction) when the first object hits the second, the second, has just as much energy as the 1st and pushes it back on the 1st Explain Newtons law of conservation of Energy energy cannot be created or destroyed but transsfored Momentum MASS X VELOCITY Velocity how fast an object is moving Potential Energy energy that can be stored in like rubber bands ect. Mechanical Energy Energy due to its motion or stored energy Energy ablity to work Force a push or pull Inertia if at reast stays at rest, if moving stays moving Mass the amount of matter that is contained by an object Centripetal force requirment an imward force acting upon an objject that is moving in a circle. Kinetic Energy Energy of motion Four basic forces drag lift thrust gravity What fin do we use? swept tappered which sides do you tapper? the trailing edge which sides do you round? leading edge and tip what are the four types of fins? eliptical rectangular swept tappered straight tappered The force experienced by any ovject moving through a fluid drag the retarding forcre produced by an object sliding past the molecules of the fluid which it is moving friction drag a forward propulsive force that moves an object thrust The study of motion of air and the relative motion between air and objects in the air aeridynamics What makes drag increase? larger and rougher surface thicker fluid faster the object is moving Things that effect friction drag surface area roughness of surface density of fluid Viscosity mesures resistance too motion in a fluid HOney has a ____ viscosity high Vacuum absence of air In a Vacuum would a feather or a coin drop faster same If a object reaches terminal velocity, then how much does it weigh and how much air resistance does it have? there equal 3 criteria for a good recovery system wind conditions safe returns suitability for rocket type Feather Weight Recovery Pro: Limits the terminal energy Con: Has to have a low mass Tumble Recovery pro: creates extremly high drag can reuse good for multiple stage rockets Con: the rate of decent is alot higher Streamer Recovery pro: good on windy days con: it cant be used for heavy rockkets Parachute recovery PRO: creates tremendoius drag con: can burn not good for windy days Glide Recovery pro: flys esily and decends very slow con: can get caught in thermal winds needs large decent area