Newton's First Law of Motion worksheet with definitions and a real-world application challenge.

Let's solve the task step by step based on the image you provided. The worksheet is about Newton’s First Law of Motion, and it includes:

1. A matching section where you match vocabulary terms to their definitions.
2. A challenge question asking you to apply Newton’s First Law in a real-life scenario (riding in a car that stops abruptly).

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🔹 Part 1: Matching Vocabulary Terms

We need to match each term on the left with the correct definition on the right.

Here are the terms and definitions:

#### Terms:
1. Force
2. Net force
3. Balanced forces
4. Unbalanced forces
5. Gravity
6. Friction
7. Inertia
8. Newton’s First Law of Motion

#### Definitions:
a. a resistance to motion that occurs when surfaces are in contact with each other
b. an attractive force that all objects exert on each other
c. when all the forces acting on an object create a net force of zero, the object does not move
d. the tendency of an object to continue its current motion or lack of motion
e. states that an object at rest stays at rest and an object in motion stays in motion at the same speed and in the same direction, unless acted upon by another force
f. when all the forces acting on an object create a net force greater than zero, the object moves
g. the sum of the forces acting on an object
h. any push or pull on an object

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Now let’s match them correctly:

1. Force → h. any push or pull on an object
*(A force is any interaction that can change the motion of an object.)*

2. Net force → g. the sum of the forces acting on an object
*(Net force is the total force after combining all individual forces.)*

3. Balanced forces → c. when all the forces acting on an object create a net force of zero, the object does not move
*(When forces cancel out, there is no change in motion.)*

4. Unbalanced forces → f. when all the forces acting on an object create a net force greater than zero, the object moves
*(This causes acceleration or a change in motion.)*

5. Gravity → b. an attractive force that all objects exert on each other
*(Gravity pulls objects toward one another; Earth pulls us down.)*

6. Friction → a. a resistance to motion that occurs when surfaces are in contact with each other
*(Friction opposes motion between surfaces.)*

7. Inertia → d. the tendency of an object to continue its current motion or lack of motion
*(Inertia is the resistance to changes in motion.)*

8. Newton’s First Law of Motion → e. states that an object at rest stays at rest and an object in motion stays in motion at the same speed and in the same direction, unless acted upon by another force
*(This is the formal statement of Newton’s First Law.)*

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✔ Final Answers:

1. h
2. g
3. c
4. f
5. b
6. a
7. d
8. e

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🔹 Challenge Question:

> *Think about how Newton's First Law of Motion applies to you. Imagine that you are riding in a car that drives abruptly stops on the brake. Use Newton's First Law to explain why your body tends to move forward when this happens.*

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🧠 Explanation:

According to Newton’s First Law of Motion, an object in motion will stay in motion at the same speed and in the same direction unless acted upon by an unbalanced force.

- When the car is moving, you are also moving at the same speed as the car.
- When the car suddenly brakes, the car stops due to friction between the tires and the road.
- However, your body wants to keep moving forward because of inertia — the tendency to resist changes in motion.
- There is no force pushing you backward instantly (unless you're wearing a seatbelt), so your body continues moving forward until something stops it (like the seatbelt, dashboard, or windshield).

✔ So, your body moves forward because of inertia, which is a direct result of Newton’s First Law.

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✔ Summary Answer for Challenge:

> When the car stops suddenly, your body tends to keep moving forward because of inertia. Newton’s First Law states that an object in motion stays in motion unless acted upon by an unbalanced force. Since your body was moving with the car, it wants to continue moving forward even when the car stops. This is why you lurch forward — until a force (like a seatbelt) stops you.

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