e drill is jammed in the wall and is subjected to the torque and force shown in . rt A JA -215 MPa rt B Correct rt C a 20 N-m 125 mm Determine the normal stress at point A on the cross section of drill bit at section a-a. Express your answer to three significant figures and include the appropriate units. Enter negative value in the case of compression and positive value in the case of tension. ANSWER: Correct Determine the transverse stress at point A on the cross section of drill bit at section a-a. Express your answer to three significant figures and include the appropriate units. ANSWER: ((Tay)v) A = 0 MPa 400 mm Section a-a -5 mm Determine the torsional stress at point A on the cross section of drill bit at section a-a. Express your answer to three significant figures and include the appropriate units. ANSWER: ((Txz)T) A = 150 N

Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
Section: Chapter Questions
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**Problem 7**

The drill is jammed in the wall and is subjected to the torque and force shown in the diagram.

**Diagram Description:**

The diagram illustrates a hand-held drill. It shows the following dimensions and forces:

- The drill extends horizontally and has a torque of 20 N·m at the drill bit.
- A force of 150 N is applied vertically downward at the handle.
- The horizontal distance from the bit to the handle's force application point is 400 mm.
- The section labeled \( a - a \) is located 125 mm from the handle, closer to the drill bit.
- The drill bit has a diameter of 5 mm at section \( a - a \).

**Part A**

Determine the normal stress at point \( A \) on the cross-section of the drill bit at section \( a - a \).

*Express your answer to three significant figures and include the appropriate units. Enter a negative value in the case of compression and a positive value in the case of tension.*

- **ANSWER:** \(\sigma_A = -215 \, \text{MPa}\)

**Correct**

**Part B**

Determine the transverse stress at point \( A \) on the cross-section of the drill bit at section \( a - a \).

*Express your answer to three significant figures and include the appropriate units.*

- **ANSWER:** \((\tau_{xy})_A = 0 \, \text{MPa}\)

**Correct**

**Part C**

Determine the torsional stress at point \( A \) on the cross-section of the drill bit at section \( a - a \).

*Express your answer to three significant figures and include the appropriate units.*

- **ANSWER:** \((\tau_{xz})_A =\) 

[Space provided for answer input]
Transcribed Image Text:**Problem 7** The drill is jammed in the wall and is subjected to the torque and force shown in the diagram. **Diagram Description:** The diagram illustrates a hand-held drill. It shows the following dimensions and forces: - The drill extends horizontally and has a torque of 20 N·m at the drill bit. - A force of 150 N is applied vertically downward at the handle. - The horizontal distance from the bit to the handle's force application point is 400 mm. - The section labeled \( a - a \) is located 125 mm from the handle, closer to the drill bit. - The drill bit has a diameter of 5 mm at section \( a - a \). **Part A** Determine the normal stress at point \( A \) on the cross-section of the drill bit at section \( a - a \). *Express your answer to three significant figures and include the appropriate units. Enter a negative value in the case of compression and a positive value in the case of tension.* - **ANSWER:** \(\sigma_A = -215 \, \text{MPa}\) **Correct** **Part B** Determine the transverse stress at point \( A \) on the cross-section of the drill bit at section \( a - a \). *Express your answer to three significant figures and include the appropriate units.* - **ANSWER:** \((\tau_{xy})_A = 0 \, \text{MPa}\) **Correct** **Part C** Determine the torsional stress at point \( A \) on the cross-section of the drill bit at section \( a - a \). *Express your answer to three significant figures and include the appropriate units.* - **ANSWER:** \((\tau_{xz})_A =\) [Space provided for answer input]
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