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To investigate the effects of a parachutes shape and surface area, on it time of decent.
Member rating: No Rating | Words: | Submitted: Wed May 17 2006
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SAC 1A: Investigation: Speed of decent in a Parachute By Andrew Cooke Date of Practical: 05/April/2006 Aim: To investigate the effects of a parachutes shape and surface area, on it time of decent. Theory: A parachute works by increasing the surface area of a free falling object; this creates more drag which results in the decrease of the speed of the object. The drag opposes the downward force of gravity.(figure 1) The force of gravity is not totally eliminated but reduced enough to allow the object to land safely. There are two equations that can be used to determine. Figure 1 An equation can be used to work out the surface area of a parachute for a given weight Where: g = the acceleration due to gravity, 9.81 m/s2 at sea level m = the mass of the rocket (propellant consumed) ? = the density of air at sea level (1225 g/m3) Cd = the coefficient of drag of...
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