Rube-Goldberg Device EF_151 Sec. A-2 Fall 2006 Rube-Goldberg Device.

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Presentation transcript:

Rube-Goldberg Device EF_151 Sec. A-2 Fall 2006 Rube-Goldberg Device

Our Team Wes Tipton James Rushford George Quarles EF_151 Sec. A-2 Fall 2006 Rube-Goldberg Device

The Dam EF_151 Sec. A-2 Fall 2006 Rube-Goldberg Device

Purpose Convert potential gravitational energy to useful electrical energy Stop water flow after a certain amount of water has passed through system with gravitational potential energy EF_151 Sec. A-2 Fall 2006 Rube-Goldberg Device

Overview EF_151 Sec. A-2 Fall 2006 Rube-Goldberg Device

Demonstration EF_151 Sec. A-2 Fall 2006 Rube-Goldberg Device

Energy Conversions First Conservation Of Energy PE = KE gh = ½ v^2 Theoretical v_water = 6.26 m/s EF_151 Sec. A-2 Fall 2006 Rube-Goldberg Device

Energy Conversions Second Conservation Of Energy Theoretical E_out = ½ m(6.26)^2 m= change in volume of water (about 2L = 2Kg) Actual E_out = measured Measured: Volts/Resistance = current Current x Voltage = watts = .036 J/sec Watts x time = Joules Measure time (in sec.) for change in volume Actual/Theoretical x100 = %Efficiency EF_151 Sec. A-2 Fall 2006 Rube-Goldberg Device

Energy Conversions Third Potential Energy Float triggers elevated weight Force of weight due to gravity is greater than resistance forces on valve—pulls valve shut mgh > M_s Water stops flowing, system stops EF_151 Sec. A-2 Fall 2006 Rube-Goldberg Device

Conclusions Inefficient System Energy is lost during impact of water droplets to spoon Resistance Forces Water in tubing Friction on turbine But still pretty awesome EF_151 Sec. A-2 Fall 2006 Rube-Goldberg Device

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