4. In science activity, the pupils experiment to compare how objects move on different surfaces, so they use cotton balls illustration board and sand paper. Can you guess what their conclusion is?​

4. In science activity, the pupils experiment to compare how objects move on different surfaces, so they use cotton balls illustration board and sand paper. Can you guess what their conclusion is?​

Answer:By comparing how the object moves on these surfaces, the pupils can observe the relationship between friction and surface texture.

Explanation:

Friction: This is the force that resists the movement of an object when two surfaces are in contact.

Surface Texture: Rougher surfaces have more friction because there's more contact area between the surfaces, causing objects to slow down or stop more easily. Smoother surfaces have less contact area, resulting in less friction and allowing objects to move with less resistance.

In the experiment:

Cotton balls: These are likely the smoothest surface, so the object (maybe a marble or toy car) should travel the farthest or fastest on the cotton balls due to minimal friction.

Illustration board: This is likely smoother than sandpaper but rougher than cotton balls. The object should travel farther or faster on the illustration board compared to sandpaper but less than on cotton balls.

Sandpaper: This is the roughest surface, so the object will experience the most friction and likely travel the shortest distance or slowest.