Grade 3 science worksheet on balanced and unbalanced forces, showing hands pushing a book to illustrate force interactions.

Problem Explanation:

The worksheet is about understanding balanced and unbalanced forces. The task involves two scenarios where you interact with a book on a table to observe the effects of forces.

#### Key Concepts:
1. Unbalanced Forces: When the forces acting on an object are not equal in magnitude or direction, the object will move or change shape.
2. Balanced Forces: When the forces acting on an object are equal in magnitude and opposite in direction, the object remains stationary or continues moving at a constant speed.

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Scenario 1:

Task: Put a book on a table. With one hand, push the book a little bit. What happens?

#### Solution:
- When you push the book with one hand, you apply a force in one direction.
- Since there is no opposing force of equal magnitude from the other side, the forces are unbalanced.
- As a result, the book will move in the direction of the applied force.

#### Answer:
The book will move in the direction you pushed it.

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Scenario 2:

Task: Now put one hand on each side of the book. Push with both hands toward the middle. Try to put equal force on the book with each hand. What happens?

#### Solution:
- In this case, you are applying a force on both sides of the book.
- If the forces are equal in magnitude and opposite in direction (i.e., balanced), the net force on the book will be zero.
- When the forces are balanced, the book will not move or change its position.

#### Answer:
The book will remain stationary because the forces are balanced.

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Final Answers:

1. Scenario 1: The book will move in the direction you pushed it.
2. Scenario 2: The book will remain stationary because the forces are balanced.

$$
\boxed{\text{The book moves in Scenario 1 and remains stationary in Scenario 2.}}
$$