Aerodynamics Parachutes work on the principles of gravity and air resistance and in effect‚ terminal velocity. Air resistance (air friction) Air resistance is an upward force exerted on a body while it is in the air and is the result of air molecules that come in contact with the surface of the falling object. This force attempts to counteract gravity and other downwards forces influencing a body. The amount of air resistance encountered by an object is dependent on two factors: speed of the object
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the piece of the filter paper affect the terminal velocity for the cone to fall. The following will be kept constant meter ruler‚ stopwatch‚ and filter paper. Hypothesis: ‘If the sector size is the increase‚ then the terminal velocity will decrease.’ The reason is that if the sector size is bigger‚ the surface area of the cone will become smaller. If the surface area is smaller‚ than the friction will be less‚ so there will be less terminal velocity. Variables Table: Variables
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Q2 b) Consider the velocity field V = Ax/(x²+y²)i + Ay/(x²+y²)j in the xy plane‚ where A = 10 m²/s‚ and x and y are measured in meters. i) Show this is an incompressible flow field. ii) Derive an expression for the fluid acceleration. iii) Evaluate the acceleration along the x axis‚ the y axis‚ and along a line defined by y = x. (14 marks) Question 1 ( 15 markah ) a) Define and explain briefly the following : i) velocity potential‚ f (x‚y) ( 4 markah ) ii) stream function
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accelerometer response is recorded on the PIT. Usually‚ tThe output is velocity over the time scale. Typically concrete shafts at construction sites which need pile integrity assessment have steel bar reinforcements in them and these reinforcements stick out 1.5 to 3 m10 ft above the pile top. depending upon other factors. In general PIT records obtained on piles without reinforcements exhibit a smooth record where the velocity has an initial impact pulse. Beyond this the curve tends to shift downward
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balance of forces is reached and the skydiver no longer accelerates and then reaches terminal velocity. The cross-sectional area of the skydiver in the spread eagle position encounters more air resistance than a skydiver who assumes the pencil-dive position. The greater cross-sectional area of a skydiver in the spread eagle position leads to a greater air resistance and a tendency to reach a slower terminal velocity. Once the skydiver leaves the aircraft‚ or plane‚ they leave a projectile motion and could
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kg/s‚ when the parachute is open. (a) Find the speed of the sky diver when the parachute opens. (b) Find the distance fallen before the parachute opens. (c) What is the limiting velocity vL after the parachute opens? (d) Determine how long the sky diver is in the air after the parachute opens. (e) Sketch the graph of velocity
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time‚ he was at a terminal velocity of approximately 700
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are correlated to the velocity of a volleyball spike Christina Atwood‚ Derek Tortorich Belhaven University Introduction In most sports played by athletes today‚ ball velocity and velocity of the human anatomy both have an exceptionally high correlation with the effectiveness in that sport. Athletes who can perform at a fairly high velocity‚ or that can put objects in high velocity‚ tend to excel in their sport‚ especially power sports. Due to the importance of velocity in most power sports
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Define the following terms: 1. Horizontal Cable : A type of inside cable designed for horizontal use in non-plenum areas. While horizontal cable must be fire retardant‚ the National Electrical Code (NEC) specifications are not as demanding as those governing the use of plenum cable or riser cable. See also NEC‚ plenum‚ plenum cable‚ and riser cable. 2. Backbone Cable : Backbone cabling is the inter-building and intra-building cable connections in structured cabling between entrance facilities
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7 Learner’s Material (Second Part) Grade 7 Science: Learner’s Material (Second Part) 1 2 Grade 7 Science: Learner’s Material (Second Part) 7 Learner’s Material (Second Part) GOVERNMENT PROPERTY NOT FOR SALE ALLOTTED TO District/ School: _________________________________________ Division _________________________________________________ First Year of Use:_________________________________________ Source of Fund (Year included):__________________________ Kagawaran ng Edukasyon Republika ng
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