Use the worked example above to help you solve this problem. A block with mass of 5.79 kg is attached to a horizontal spring with spring constant k = 3.32 x 10² N/m, as shown in the figure. The surface the block rests upon is frictionless. The block is pulled out to x; = 0.0510 m and released. (a) Find the speed of the block at the equilibrium point. m/s (b) Find the speed when x = 0.029 m. m/s (c) Repeat part (a) if friction acts on the block, with coefficient μ = 0.120.

Elements Of Electromagnetics
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Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
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**LEARN MORE**

**REMARKS**  
Friction or drag from immersion in a fluid damps the motion of an object attached to a spring, eventually bringing the object to rest.

**QUESTION**  
In the case of friction, what percent of the mechanical energy was lost by the time the mass first reached the equilibrium point? (*Hint: use the answers to parts (a) and (c).*)

[Input Box] %

---

**PRACTICE IT**

Use the worked example above to help you solve this problem. A block with mass of **5.79 kg** is attached to a horizontal spring with spring constant **k = 3.32 x 10² N/m**, as shown in the figure. The surface the block rests upon is frictionless. The block is pulled out to **xᵢ = 0.0510 m** and released.

(a) Find the speed of the block at the equilibrium point.  
[Input Box] m/s

(b) Find the speed when **x = 0.029 m**.  
[Input Box] m/s

(c) Repeat part (a) if friction acts on the block, with coefficient **μₖ = 0.120**.  
[Input Box] m/s
Transcribed Image Text:**LEARN MORE** **REMARKS** Friction or drag from immersion in a fluid damps the motion of an object attached to a spring, eventually bringing the object to rest. **QUESTION** In the case of friction, what percent of the mechanical energy was lost by the time the mass first reached the equilibrium point? (*Hint: use the answers to parts (a) and (c).*) [Input Box] % --- **PRACTICE IT** Use the worked example above to help you solve this problem. A block with mass of **5.79 kg** is attached to a horizontal spring with spring constant **k = 3.32 x 10² N/m**, as shown in the figure. The surface the block rests upon is frictionless. The block is pulled out to **xᵢ = 0.0510 m** and released. (a) Find the speed of the block at the equilibrium point. [Input Box] m/s (b) Find the speed when **x = 0.029 m**. [Input Box] m/s (c) Repeat part (a) if friction acts on the block, with coefficient **μₖ = 0.120**. [Input Box] m/s
**Educational Content: Analyzing the Speed of a Block on a Spring**

**Introduction to the Problem:**
The problem involves analyzing the speed of a block attached to a spring using the principles of kinetic and potential energy. The exercise is divided into three parts: without friction, at the halfway point, and with friction.

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**(A) Initial Scenario: No Friction**

1. **Equation Setup:**
   - Start by applying the conservation of energy principle:  
     \[ \frac{1}{2} mv_i^2 + \frac{1}{2} k x_i^2 = \frac{1}{2} mv_f^2 + \frac{1}{2} k x_f^2 \]
   - Initial speed \( v_i \) is 0, final position \( x_f \) is 0.

2. **Calculation:**
   - Substitute and multiply by \( 2/m \):  
     \[ \frac{k}{m} x_i^2 = v_f^2 \]
   - Solve for \( v_f \):  
     \[ v_f = \sqrt{\frac{k}{m} x_i} \]
   - Using given values:  
     \[ v_f = \sqrt{\frac{4.00 \times 10^2 \, \text{N/m}}{5.00 \, \text{kg}} (0.0500 \, \text{m})} \]    
     \[ v_f = 0.447 \, \text{m/s} \]

---

**(B) At the Halfway Point:**

1. **Equation Setup:**
   - Position \( x = 0.025 \, \text{m} \):  
     \[ \frac{k x_i^2}{m} = v_f^2 + \frac{k x_f^2}{m} \]

2. **Calculation:**
   - Solve for \( v_f \):  
     \[ v_f = \sqrt{\frac{k}{m} (x_i^2 - x_f^2)} \]
   - Using given values:  
     \[ v_f = \sqrt{\frac{4.00 \times 10^2 \, \text{N/m}}{5.00 \, \text{kg}} [(0.050 \, \text{m})^2 - (0.
Transcribed Image Text:**Educational Content: Analyzing the Speed of a Block on a Spring** **Introduction to the Problem:** The problem involves analyzing the speed of a block attached to a spring using the principles of kinetic and potential energy. The exercise is divided into three parts: without friction, at the halfway point, and with friction. --- **(A) Initial Scenario: No Friction** 1. **Equation Setup:** - Start by applying the conservation of energy principle: \[ \frac{1}{2} mv_i^2 + \frac{1}{2} k x_i^2 = \frac{1}{2} mv_f^2 + \frac{1}{2} k x_f^2 \] - Initial speed \( v_i \) is 0, final position \( x_f \) is 0. 2. **Calculation:** - Substitute and multiply by \( 2/m \): \[ \frac{k}{m} x_i^2 = v_f^2 \] - Solve for \( v_f \): \[ v_f = \sqrt{\frac{k}{m} x_i} \] - Using given values: \[ v_f = \sqrt{\frac{4.00 \times 10^2 \, \text{N/m}}{5.00 \, \text{kg}} (0.0500 \, \text{m})} \] \[ v_f = 0.447 \, \text{m/s} \] --- **(B) At the Halfway Point:** 1. **Equation Setup:** - Position \( x = 0.025 \, \text{m} \): \[ \frac{k x_i^2}{m} = v_f^2 + \frac{k x_f^2}{m} \] 2. **Calculation:** - Solve for \( v_f \): \[ v_f = \sqrt{\frac{k}{m} (x_i^2 - x_f^2)} \] - Using given values: \[ v_f = \sqrt{\frac{4.00 \times 10^2 \, \text{N/m}}{5.00 \, \text{kg}} [(0.050 \, \text{m})^2 - (0.
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