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PHYS Lab #8

# PHYS Lab #8 - David Thibodeaux PHYS 111A H03 Lab 125...

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David Thibodeaux PHYS 111A – H03 Lab 125 11/5/2010 Objective: To verify the conservation of mechanical energy in an oscillating mass-spring system. Theory: Before conducting the experiment, we should discuss the spring system: The total mechanical energy of the spring mass system is: ME = ½mv2 + ½k(x o -x) 2 + mgx In this equation, the first term is kinetic energy, the second term is the potential energy of the spring and the last term is the gravitational potential energy. (m is the mass of weight hanger in kg and k is the spring constant in N/m, xo is the distance the spring is stretched when it is in the equilibrium position measured in meters.) x is measured from the equilibrium position and x > 0 when the mass is above the equilibrium point, x = 0 when the spring is in the equilibrium position and x < 0 when the mass is below the equilibrium point. Note that when x = + xo both potential energy terms are 0. If the spring has a mass of m hanging on it, the elongation, xo, will be mg/k.

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PHYS Lab #8 - David Thibodeaux PHYS 111A H03 Lab 125...

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