Solved NAME PHYSICAL SCIENCE NEWTONS LAWS WORKSHEET III. | Chegg.com - Free Printable

Problem Analysis:

The worksheet focuses on Newton's Third Law of Motion, which states that for every action, there is an equal and opposite reaction. The task involves identifying and explaining examples of Newton's laws in various scenarios.

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Solution:

#### Section III: Newton's Third Law of Motion

13. Newton’s third law of motion is also known as the LAW OF ACTION AND REACTION.

- Explanation: Newton's Third Law states that for every action force, there is an equal and opposite reaction force. This is often summarized as "action-reaction pairs."

14. Newton’s third law says that every time there is an action force, there is also a reaction force that is equal in size and acts in the opposite direction.

- Explanation: When one object exerts a force on another (the action), the second object exerts an equal and opposite force back on the first (the reaction). These forces are always equal in magnitude but opposite in direction.

15. Newton’s third law states that forces must ALWAYS occur in pairs.

- Explanation: Forces do not exist in isolation; they always come in pairs. For every action force, there is a corresponding reaction force.

16. Listed below are ACTION forces. Tell the REACTION force.

- a. Your bottom pushing on your desk seat
- Reaction Force: The desk seat pushing upward on your bottom.
- Explanation: When you sit on the desk seat, your bottom applies a downward force on the seat. In response, the seat applies an equal and opposite upward force on your bottom.

- b. A bat hitting a baseball
- Reaction Force: The baseball hitting the bat.
- Explanation: When the bat strikes the baseball, it applies a force to the ball. The ball, in turn, applies an equal and opposite force back to the bat.

- c. Your finger pressing on your phone screen while texting
- Reaction Force: The phone screen pressing back on your finger.
- Explanation: When you press your finger on the phone screen, your finger applies a force to the screen. The screen responds by applying an equal and opposite force back to your finger.

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#### Section IV: Understanding

This section requires labeling each image/description as an example of Newton's 1st, 2nd, or 3rd Law and providing an explanation.

1. Image 1: A block being pulled with a force \( F = 20 \, \text{N} \)
- Label: 2nd Law
- Explanation: Newton's Second Law (\( F = ma \)) relates force, mass, and acceleration. Here, a force is applied to the block, causing it to accelerate. The equation shows that the acceleration depends on the applied force and the mass of the block.

2. Image 2: A hammer hitting a nail
- Label: 3rd Law
- Explanation: When the hammer strikes the nail, the hammer applies a force to the nail. According to Newton's Third Law, the nail applies an equal and opposite force back to the hammer. This interaction demonstrates the action-reaction pair.

3. Image 3: Two people pulling on a rope in opposite directions
- Label: 3rd Law
- Explanation: Each person pulls on the rope with a force, and the rope applies an equal and opposite force back to each person. This scenario illustrates the principle of action-reaction forces, where the forces are equal in magnitude but opposite in direction.

4. Image 4: A rocket launching into space
- Label: 3rd Law
- Explanation: As the rocket expels gas out of its engines, it applies a force to the gas. According to Newton's Third Law, the gas applies an equal and opposite force back to the rocket, propelling it forward. This is a classic example of the action-reaction principle.

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Final Answer:

\[
\boxed{
\begin{array}{l}
\text{13. LAW OF ACTION AND REACTION} \\
\text{14. Action, Reaction, Equal, Opposite} \\
\text{15. Pairs} \\
\text{16. a. Desk seat pushing upward on your bottom} \\
\text{b. Baseball hitting the bat} \\
\text{c. Phone screen pressing back on your finger} \\
\text{IV.} \\
\text{Image 1: 2nd Law (Force causes acceleration)} \\
\text{Image 2: 3rd Law (Hammer-nail interaction)} \\
\text{Image 3: 3rd Law (Action-reaction in tug-of-war)} \\
\text{Image 4: 3rd Law (Rocket propulsion)}
\end{array}
}
\]