An object of mass 2 grams is attached to a vertical spring with spring constant 8 grams/sec". Neglect any friction with the air. (a) Find the differential equation y" = f(y, y') satisfied by the function y, the displacement of the object from its equilibrium position, positive downwards. Write y for y(t) and yp for y' (t). y" -4y Σ (b) Find r1, r2, roots of the characteristic polynomial of the equation above. r1, r2 = 2i, -2i Σ (b) Find a set of real-valued fundamental solutions to the differential equation above. Y1(t) = cos(2t) Σ

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
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An object of mass 2 grams is attached to a vertical spring with spring constant 8 grams/sec". Neglect any friction with the air.
(a) Find the differential equation y" = f(y, y') satisfied by the function y, the displacement of the object from its equilibrium position, positive
downwards. Write y for y(t) and yp for y' (t).
y"
-4y
Σ
(b) Find r1, r2, roots of the characteristic polynomial of the equation above.
r1, r2 = 2i, -2i
Σ
(b) Find a set of real-valued fundamental solutions to the differential equation above.
Y1(t) = cos(2t)
Σ
Transcribed Image Text:An object of mass 2 grams is attached to a vertical spring with spring constant 8 grams/sec". Neglect any friction with the air. (a) Find the differential equation y" = f(y, y') satisfied by the function y, the displacement of the object from its equilibrium position, positive downwards. Write y for y(t) and yp for y' (t). y" -4y Σ (b) Find r1, r2, roots of the characteristic polynomial of the equation above. r1, r2 = 2i, -2i Σ (b) Find a set of real-valued fundamental solutions to the differential equation above. Y1(t) = cos(2t) Σ
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