Show that the time rate of change of mechanical energy for a damped, undriven oscillator is given by dE :-bv? dt and hence is always negative. To do so, differentiate the expression for the mechanical energy of an oscillator, E = ½mv² + ½kx² and apply a damping force Fdamp = -bv. (cf. Eq.12.28 in the text book)

Principles of Physics: A Calculus-Based Text
5th Edition
ISBN:9781133104261
Author:Raymond A. Serway, John W. Jewett
Publisher:Raymond A. Serway, John W. Jewett
Chapter12: Oscillatory Motion
Section: Chapter Questions
Problem 36P: Show that the time rate of change of mechanical energy for a damped, undriven oscillator is given by...
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Show that the time rate of change of mechanical energy for a damped, undriven oscillator is
given by
dE
:-bv?
dt
and hence is always negative. To do so, differentiate the expression for the mechanical
energy of an oscillator, E = ½mv² + ½kx² and apply a damping force Fdamp = -bv.
(cf. Eq.12.28 in the text book)
Transcribed Image Text:Show that the time rate of change of mechanical energy for a damped, undriven oscillator is given by dE :-bv? dt and hence is always negative. To do so, differentiate the expression for the mechanical energy of an oscillator, E = ½mv² + ½kx² and apply a damping force Fdamp = -bv. (cf. Eq.12.28 in the text book)
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