PH1110-Burnham-Exp5-Energy CD

PH1110-Burnham-Exp5-Energy CD - b U s = ky t U s = ky m U s...

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Conservation of Energy 1. Make free-body diagrams of a mass oscillating up and down on the end of a spring for three situations. Label the forces using mg and ky, the spring force. Also indicate if the situation could correspond to the top, middle, or bottom of the oscillation. 2. If the zero for the potentials is the position of the mass when the spring is unstretched, write the gravitational and spring potentials and kinetic energies for the top, middle, and bottom positions when the mass is oscillating around its equilibrium position using m, g, y t , y m , y b , v m , and k. The subscripts refer to the top, middle, and bottom of the oscillation. 3. Use the information above to write the total mechanical energy for each situation. WPI Physics Department 1 PH 1110 A10, nab@wpi.edu Name and section number: Connor Downie 1 Partner’s name and section number: Brian Doyon 1 Top: U g = mgy t Middle: U g = mgy m Bottom: U g = mgy
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Unformatted text preview: b U s = ky t U s = ky m U s = ky b K = 0 K = (mv m 2 ) / 2 K = 0 E top = (mgy t )+(ky t ) E middle = (mgy m )+( ky m )+( mv m 2 ) / 2) E bottom = (mgy b )+(ky b ) 4. Insert into this box the annotated y(t) graph from Logger Pro, with data and boxes legible. 5. Insert into this box the E(t) graph from the spreadsheet. WPI Physics Department 2 PH 1110 A10, nab@wpi.edu 6. Individually report your result for E(t) in standard form. State whether or not mechanical energy is conserved and how the E(t) graph supports your conclusion. Describe how energy is converted from one form to another. WPI Physics Department 3 PH 1110 A10, nab@wpi.edu The linear fit of the graph, is a straight line. This shows that the summation of energy is constant. The energy is being conserved because it is being converted from potential energy to mechanical energy during different points of oscillation....
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This note was uploaded on 03/02/2011 for the course PHYS 1110 taught by Professor Burnham during the Fall '10 term at WPI.

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PH1110-Burnham-Exp5-Energy CD - b U s = ky t U s = ky m U s...

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