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1. |
Solve the problem of un-damped forced vibrations of a spring in the case where the forcing function is f(t)=A sin t. D.E associated with the problem is (m frac{d^2 y}{dt^2} + ky = f(t) ), with initial conditions as y(0)=y0 and y (0)=y1 and assume 2 = k/m, =A/m. |
A. | y = y<sub>0</sub> cos u2061 t + y<sub>1</sub> sin u2061 t + ( frac{ cos t}{- ^2+ ^2} ) |
B. | y = y<sub>0</sub> cos u2061 t + (y<sub>1</sub>/ )sin u2061 t + ( frac{cos t}{ ^2+ ^2} ) |
C. | y = y<sub>0</sub> cos u2061 t + (y<sub>1</sub> )sin u2061 t + ( frac{sin t}{ ^2+ ^2} ) |
D. | y = y<sub>0</sub> cos u2061 t + (y<sub>1</sub>/ )sin u2061 t + ( frac{ sin t}{- ^2+ ^2} ) |
Answer» E. | |