Direction for questions: Answer questions based on your understanding of the following paragraph and related studied concepts.
If you sit on the floor some distance away from your partner and roll a ball on the floor towards him/her. Ask your partner to stop the rolling ball.
Can you identify what helped the ball to start rolling?

Answer

To answer the question about what helps the ball to start rolling when you push it towards your partner, we can break down the explanation into clear steps:

### Step-by-Step Solution:

1. **Understanding the Initial Action**: When you push the ball, you apply a force to it. This force is crucial as it initiates the movement of the ball.

2. **Force Application**: The force you exert on the ball causes it to slide forward. This is the first step in the motion of the ball.

3. **Role of Friction**: As the ball begins to slide, it also starts to rotate. This rotation occurs because of the friction between the ball and the floor. The point of contact between the ball and the floor is where friction acts.

4. **Friction's Effect on Motion**: The frictional force not only helps in stopping the ball but also aids in its rolling motion. It allows the ball to transition from sliding to rolling. Without friction, the ball would simply slide without rotating.

5. **Conclusion**: Therefore, the ball starts rolling due to the combination of the force you apply and the friction acting at the point of contact with the floor. The frictional force is essential for the ball to roll rather than just slide.

### Final Answer:
The ball starts rolling because of the force applied to it and the friction between the ball and the floor, which allows it to rotate.

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