A 10 kilogram object suspended from the end of a vertically hanging spring stretches the spring 9.8 centimeters. At time t resulting mass-spring system is disturbed from its rest state by the force F(t) = 180 cos(8t). The force F(t) is expressed in Newtons and is 0, the positive in the downward direction, and time is measured in seconds.

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Chapter1: Units, Trigonometry. And Vectors
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**Mass-Spring System Problem**

A 10-kilogram object suspended from the end of a vertically hanging spring stretches the spring 9.8 centimeters. At time \( t = 0 \), the resulting mass-spring system is disturbed from its rest state by the force \( F(t) = 180 \cos(8t) \). The force \( F(t) \) is expressed in Newtons and is positive in the downward direction, and time is measured in seconds.

**a. Determine the spring constant \( k \).**
- \( k = \) [1000] Newtons/meter

**b. Formulate the initial value problem for \( y(t) \), where \( y(t) \) is the displacement of the object from its equilibrium rest state, measured positive in the downward direction. (Give your answer in terms of \( y, y', y'', t \).)**

- Differential equation: \[ \text{(fill in here)} \]
- Initial conditions: \( y(0) = \) [0] and \( y'(0) = \) [0]

**c. Solve the initial value problem for \( y(t) \).**

- \( y(t) = \) \[ \text{(fill in here)} \]

**d. Plot the solution and determine the maximum excursion from equilibrium made by the object on the time interval \( 0 \leq t < \infty \). If there is no such maximum, enter NONE.**

- Maximum excursion = \[ \text{(fill in here)} \] meters

This problem involves understanding the dynamics of a mass attached to a spring, taking into account external forces and initial conditions.
Transcribed Image Text:**Mass-Spring System Problem** A 10-kilogram object suspended from the end of a vertically hanging spring stretches the spring 9.8 centimeters. At time \( t = 0 \), the resulting mass-spring system is disturbed from its rest state by the force \( F(t) = 180 \cos(8t) \). The force \( F(t) \) is expressed in Newtons and is positive in the downward direction, and time is measured in seconds. **a. Determine the spring constant \( k \).** - \( k = \) [1000] Newtons/meter **b. Formulate the initial value problem for \( y(t) \), where \( y(t) \) is the displacement of the object from its equilibrium rest state, measured positive in the downward direction. (Give your answer in terms of \( y, y', y'', t \).)** - Differential equation: \[ \text{(fill in here)} \] - Initial conditions: \( y(0) = \) [0] and \( y'(0) = \) [0] **c. Solve the initial value problem for \( y(t) \).** - \( y(t) = \) \[ \text{(fill in here)} \] **d. Plot the solution and determine the maximum excursion from equilibrium made by the object on the time interval \( 0 \leq t < \infty \). If there is no such maximum, enter NONE.** - Maximum excursion = \[ \text{(fill in here)} \] meters This problem involves understanding the dynamics of a mass attached to a spring, taking into account external forces and initial conditions.
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