# how to make the gravitational force working model

### Introduction to the Model:

Gravitational Force Explanation: Gravitational force is a natural phenomenon by which all objects with mass attract one another. Earth’s gravity is what keeps objects on the ground, and it also governs the motion of celestial bodies, such as the moon and artificial satellites, which orbit the planet.

Working Principle of the Model: In this model, the large thermocol ball represents Earth, and the small balls represent objects like the moon or satellites. The magnets hidden inside the balls simulate the gravitational attraction that Earth exerts on these objects. When the small balls are brought near the large ball, the magnetic force between the magnets mimics the gravitational pull, drawing the small balls towards the large one. This demonstrates the concept of how gravity works, pulling objects towards the center of the Earth.

Applications: Understanding gravitational force is crucial in fields such as astronomy, physics, and engineering. It explains why objects fall to the ground, why the moon orbits Earth, and why planets revolve around the sun. This model provides a simple yet effective way to visualize these fundamental concepts.

## Making of Earth Gravitational Force Working Model

Creating a working model to demonstrate Earth’s gravitational force using thermocol balls and hidden magnets is a creative way to illustrate how gravity works. Here’s how you can make the model and an introduction to explain its working.

### Materials Needed:

• Large thermocol (polystyrene) ball: Represents the Earth.
• Small thermocol balls: Represent objects like the moon, satellites, or other celestial bodies.
• Small magnets: To be hidden inside the thermocol balls to mimic the gravitational attraction.
• Glue: To secure the magnets inside the thermocol balls.
• Paint and markers: To decorate the thermocol balls.
• String or wire: To suspend the smaller balls around the larger one.
• Wooden or plastic base: To hold the model steady.
• Craft knife: To cut and hollow out the thermocol balls.
• Tape: To help secure parts if needed.

### Step-by-Step Instructions:

1. Prepare the Large Thermocol Ball (Earth):
• Take the large thermocol ball, which represents Earth, and use a craft knife to make a small cavity inside it. This is where you will place the magnet.
• Insert a strong magnet into the cavity. Ensure it is securely placed so that it doesn’t move. Cover the cavity with the cut-out piece and seal it with glue.
• Decorate the ball to represent Earth by painting it with blue for water and green/brown for landmasses.
2. Prepare the Small Thermocol Balls (Objects):
• Take the small thermocol balls, which represent the moon, satellites, or other objects, and make small cavities in them using the craft knife.
• Insert small magnets into these balls. Ensure that the polarity of the magnets is such that they will attract to the magnet inside the large ball (Earth). Seal the cavities with glue.
• Decorate these balls as needed (e.g., gray for the moon).
3. Assemble the Model:
• Attach strings or wires to the small thermocol balls to suspend them around the large ball. The strings should be of different lengths to represent various orbits or positions in space.
• Attach the other ends of the strings to a wooden or plastic base, ensuring the small balls are positioned near the large ball but still free to move.
4. Test the Model:
• Gently move the small balls towards the large ball. If the magnets are strong enough, the small balls will be attracted to the large ball, mimicking the effect of gravity.
• The attraction between the magnets simulates how gravity pulls objects towards the Earth.