Compared to the inertia of a 0.10-kilogram steel ball, the inertia of a 0.20-kilogram Styrofoam ball is which of the following?

Inertia is directly proportional to mass. This means that the greater the mass of an object, the greater its inertia, and vice versa. The material of the object (whether steel or Styrofoam) does not affect its inertia—only its mass does.

Let's compare the masses of the two objects:

- The steel ball has a mass of 0.10 kg.
- The Styrofoam ball has a mass of 0.20 kg.

Since the Styrofoam ball has double the mass of the steel ball, the inertia of the Styrofoam ball is **twice that of the steel ball**.

### Summary:
The inertia of the 0.20-kilogram Styrofoam ball is twice the inertia of the 0.10-kilogram steel ball.

Would you like any additional details or further clarification?

### Related questions:
1. How is inertia related to Newton's first law of motion?
2. If both balls were moving at the same speed, how would their momenta compare?
3. What is the role of mass in determining an object's resistance to changes in motion?
4. How does inertia affect objects in space, where gravity is minimal?
5. What other factors, besides mass, influence an object's motion?

### Tip:
Remember, inertia depends solely on mass, not on the material or size of the object.

Compare the inertia of a 0.10 kg steel ball and a 0.20 kg Styrofoam ball. In this problem, you'll learn that inertia depends only on mass and not the material of the object. A detailed explanation of inertia and Newton's First Law of Motion is provided, suitable for Grades 6-8.

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