Verify That $y=-2 \cos (5 t)$ Is a Solution Of $y^{\prime \prime}=-25 y$

question 12

Multiple Choice

Verify that $y=-2 \cos (5 t)$ is a solution of $y^{\prime \prime}=-25 y$ .Suppose that y describes the motion of a mass on a spring. How does the motion start when t = 0?

• A)lowest point
• B)in the middle
• C)highest point

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