< You push against the floor when you walk and the floor pushes back on you. An object will not accelerate unless a net force is applied to it. Balloon moves upwards O

College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter1: Units, Trigonometry. And Vectors
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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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## Understanding Newton's Laws of Motion

Newton described three fundamental laws of motion. These laws form the basis of classical mechanics and explain how objects move in response to forces. Let's explore how these laws apply to everyday situations.

### Exercise: Identify the Correct Newton's Law

For each of the scenarios listed, determine which of Newton's Laws it exemplifies:

1. **A soccer ball sits on the ground until you kick it.**
   - **Newton's 1st Law** (✔️)

2. **When twirling a ball on a string in a circular path, if the string were to break, the ball would fly off. Which of Newton’s 3 Laws of Motion applies to the direction the ball will fly?**
   - **Newton's 1st Law** (✔️)

3. **A swimmer pushes water back with her arms but her body moves forward.**
   - **Newton's 3rd Law** (✔️)

4. **A small car and a large truck are pushed with the same force. The car accelerates more quickly because its mass is less than that of the truck.**
   - **Newton's 2nd Law** (✔️)
  
5. **An automobile you are riding in suddenly stops, but your body continues to go forward.**
   - **Newton's 1st Law** (✔️)

6. **You push against the floor when you walk and the floor pushes back on you.**
   - **Newton's 3rd Law** (✔️)

7. **An object will not accelerate unless a net force is applied to it.**
   - **Newton's 1st Law** (✔️)

### Table Summary

- **Newton's 1st Law (Law of Inertia):** Describes the tendency of an object to resist changes in its state of motion.
- **Newton's 2nd Law (Law of Acceleration):** Explains how the velocity of an object changes when it is subjected to an external force.
- **Newton's 3rd Law (Action and Reaction):** States that for every action, there is an equal and opposite reaction.

**Graph/Diagram Explanation:**
The table provided uses checkmarks to indicate which of Newton's Laws each scenario exemplifies. There is also an illustration of a swimmer moving through water, demonstrating Newton's 3rd Law—showing how the swimmer propels forward by pushing water backward.
Transcribed Image Text:## Understanding Newton's Laws of Motion Newton described three fundamental laws of motion. These laws form the basis of classical mechanics and explain how objects move in response to forces. Let's explore how these laws apply to everyday situations. ### Exercise: Identify the Correct Newton's Law For each of the scenarios listed, determine which of Newton's Laws it exemplifies: 1. **A soccer ball sits on the ground until you kick it.** - **Newton's 1st Law** (✔️) 2. **When twirling a ball on a string in a circular path, if the string were to break, the ball would fly off. Which of Newton’s 3 Laws of Motion applies to the direction the ball will fly?** - **Newton's 1st Law** (✔️) 3. **A swimmer pushes water back with her arms but her body moves forward.** - **Newton's 3rd Law** (✔️) 4. **A small car and a large truck are pushed with the same force. The car accelerates more quickly because its mass is less than that of the truck.** - **Newton's 2nd Law** (✔️) 5. **An automobile you are riding in suddenly stops, but your body continues to go forward.** - **Newton's 1st Law** (✔️) 6. **You push against the floor when you walk and the floor pushes back on you.** - **Newton's 3rd Law** (✔️) 7. **An object will not accelerate unless a net force is applied to it.** - **Newton's 1st Law** (✔️) ### Table Summary - **Newton's 1st Law (Law of Inertia):** Describes the tendency of an object to resist changes in its state of motion. - **Newton's 2nd Law (Law of Acceleration):** Explains how the velocity of an object changes when it is subjected to an external force. - **Newton's 3rd Law (Action and Reaction):** States that for every action, there is an equal and opposite reaction. **Graph/Diagram Explanation:** The table provided uses checkmarks to indicate which of Newton's Laws each scenario exemplifies. There is also an illustration of a swimmer moving through water, demonstrating Newton's 3rd Law—showing how the swimmer propels forward by pushing water backward.
**Final Exam Review**

1. **Statement**: 
   - "You push against the floor when you walk and the floor pushes back on you."
2. **Key Concept**:
   - An object will not accelerate unless a net force is applied to it.

**Diagram Explanation**:

The diagram illustrates how a balloon moves upward when air is pushed downward:

- **Visual Description**:
  - A pink balloon is shown in the diagram.
  - Arrows indicate the direction of forces.
  - An upward arrow labeled "Balloon moves upwards" shows the motion of the balloon.
  - A downward arrow labeled "Air" represents the air being pushed downward out of the balloon.

This diagram visually represents Newton's Third Law of Motion: For every action, there is an equal and opposite reaction. When the air is pushed downward, an equal force pushes the balloon upward, causing it to rise.

The diagram helps in understanding the interaction of forces that result in motion, adhering to the principles of physics.
Transcribed Image Text:**Final Exam Review** 1. **Statement**: - "You push against the floor when you walk and the floor pushes back on you." 2. **Key Concept**: - An object will not accelerate unless a net force is applied to it. **Diagram Explanation**: The diagram illustrates how a balloon moves upward when air is pushed downward: - **Visual Description**: - A pink balloon is shown in the diagram. - Arrows indicate the direction of forces. - An upward arrow labeled "Balloon moves upwards" shows the motion of the balloon. - A downward arrow labeled "Air" represents the air being pushed downward out of the balloon. This diagram visually represents Newton's Third Law of Motion: For every action, there is an equal and opposite reaction. When the air is pushed downward, an equal force pushes the balloon upward, causing it to rise. The diagram helps in understanding the interaction of forces that result in motion, adhering to the principles of physics.
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