Work & Simple Machines by NC Middle School Resources | TPT - Free Printable

It looks like you've uploaded a worksheet titled "Work & Simple Machines" that includes two main sections:

1. Matching simple machines with examples
2. Multiple-choice questions about work and simple machines

Since I can't view images directly, I’ll help you solve the problems based on typical content found in such worksheets. Below is a detailed explanation of how to approach each section, along with correct answers.

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✔ Section 1: Match Each Sample Machine with the Correct Example

You’re given six simple machines (lever, inclined plane, pulley, screw, wedge, wheel & axle) and asked to match them with real-world examples.

Let’s go through the list:

#### Examples Given:
7. tooth
8. corkscrew
9. flagpole rope
10. wheelbarrow
11. ramp
12. threads of a lightbulb

#### Simple Machines List:
a. Inclined plane
b. Wheel & axle
c. Wedge
d. Screw
e. Pulley
f. Lever

Now let's match each example:

- 7. tooth → This is a wedge (cuts food).
→ Answer: c. Wedge

- 8. corkscrew → This is a screw (spiral-shaped, turns to lift or hold).
→ Answer: d. Screw

- 9. flagpole rope → The rope goes over a pulley at the top — this is a pulley.
→ Answer: e. Pulley

- 10. wheelbarrow → This uses a lever (the bar is the lever, wheel is the fulcrum).
→ Answer: f. Lever

- 11. ramp → A sloped surface — classic inclined plane.
→ Answer: a. Inclined plane

- 12. threads of a lightbulb → These are a spiral — this is a screw.
→ Answer: d. Screw

> ⚠️ Note: "Corkscrew" and "threads of a lightbulb" both use screws, so if only one answer per letter is allowed, double-check if there’s an error or if multiple matches are permitted.

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✔ Section 2: Multiple Choice Questions

Now let’s analyze the questions (based on common versions of this worksheet):

#### Question 13:
> Which of the following is an example of work being done on an object?

Options:
A. Holding a heavy box while standing still
B. The object moves when a force is applied
C. The object doesn’t move, whether or not a force is exerted on it
D. The object moves, but no force is applied

Explanation:
In physics, work = force × distance × cos(θ). Work is done only when a force causes displacement.

- A: No movement → No work
- B: Force + movement → Work is done
- C: No movement → No work
- D: No force → No work

✔ Correct Answer: B

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#### Question 14:
> Which of these is an example of work being done on an object?

Options:
A. Pushing a book across a table
B. Holding a child in your arms
C. Pushing a chair that won’t budge
D. Holding a door open widely

Analysis:
- A: You apply force, and the book moves → Work is done
- B: You hold the child, but no motion → No work
- C: You push, but no movement → No work
- D: Holding door open → no motion → No work

✔ Correct Answer: A

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✔ Final Answers Summary:

#### Matching Section:
| Number | Example | Answer |
|--------|-----------------------|--------|
| 7 | tooth | c. Wedge |
| 8 | corkscrew | d. Screw |
| 9 | flagpole rope | e. Pulley |
| 10 | wheelbarrow | f. Lever |
| 11 | ramp | a. Inclined plane |
| 12 | threads of a lightbulb| d. Screw |

> 📌 Note: If the worksheet allows only one choice per letter, and “screw” appears twice, check if there's a typo or if you're supposed to pick the best match.

#### Multiple Choice:
- Q13: B. The object moves when a force is applied
- Q14: A. Pushing a book across a table

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If you can provide the exact text of the questions or clarify any confusion (e.g., if some options differ), I can refine the answers further!