**Problem Statement:**While doing her crossfit workout, Yasmeen holds a 7.0 kg weight at arm's length, a distance of 0.57 m from her shoulder joint. What is the torque about her shoulder joint due to the weight if her arm is horizontal?**Options:**- A. 30 N · m- B. 4.0 N · m- C. 43 N · m- D. 39 N · m**Answer Choices:**- ○ B- ○ C- ○ A- ○ D**Explanation:**To solve for the torque, use the formula:\[ \text{Torque} = \text{Force} \times \text{Distance} \]Where the force is the weight of the object, calculated as:\[ \text{Force} = \text{mass} \times \text{gravity} = 7.0 \, \text{kg} \times 9.8 \, \text{m/s}^2 = 68.6 \, \text{N} \]Thus, the torque is:\[ \text{Torque} = 68.6 \, \text{N} \times 0.57 \, \text{m} = 39.1 \, \text{N} \cdot \text{m} \]The correct answer is closest to option D. 39 N · m. **Question:**If the maximum stress in the elastic limit for a piece of plastic is 350 MPa (mega-Pascals), what will happen to the plastic after it is subjected to a 355 MPa stress?**Options:**A. It will permanently deform. B. It will return to its original shape. C. It will fracture. D. It depends on the strain. **Answer Choices:**- ○ C- ○ B- ○ D- ○ A

Given data: Mass (m) = 7.0 kg Distance (r) = 0.57 m The arm is horizontal Required: The torque (τ)…

While doing her crossfit workout, Yasmeen holds an 7.0 kg weight at arm's length, a distance of 0.57 m from her shoulder joint. What is the torque about her shoulder joint due to the weight if her arm is horizontal? A. 30 N.m B. 4.0 N.m C. 43 N.m D. 39 N.m OB O C O A OD

While doing her crossfit workout, Yasmeen holds an 7.0 kg weight at arm's length, a distance of 0.57 m from her shoulder joint. What is the torque about her shoulder joint due to the weight if her arm is horizontal? A. 30 N.m B. 4.0 N.m C. 43 N.m D. 39 N.m OB O C O A OD

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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Concept explainers

Torque

Torque is the rotational equivalent of linear force in physics and mechanics. Based on the course of study, it is also known as the moment of force, rotational force, or turning effect.

Question

**Problem Statement:**

While doing her crossfit workout, Yasmeen holds a 7.0 kg weight at arm's length, a distance of 0.57 m from her shoulder joint. What is the torque about her shoulder joint due to the weight if her arm is horizontal?

**Options:**
- A. 30 N · m
- B. 4.0 N · m
- C. 43 N · m
- D. 39 N · m

**Answer Choices:**
- ○ B
- ○ C
- ○ A
- ○ D

**Explanation:**

To solve for the torque, use the formula:

\[ \text{Torque} = \text{Force} \times \text{Distance} \]

Where the force is the weight of the object, calculated as:

\[ \text{Force} = \text{mass} \times \text{gravity} = 7.0 \, \text{kg} \times 9.8 \, \text{m/s}^2 = 68.6 \, \text{N} \]

Thus, the torque is:

\[ \text{Torque} = 68.6 \, \text{N} \times 0.57 \, \text{m} = 39.1 \, \text{N} \cdot \text{m} \]

The correct answer is closest to option D. 39 N · m.

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