Types of force - Frictional force

Frictional force is a force that occurs when two surfaces rub against each other. It always works in the opposite direction of motion, meaning it slows things down or stops them from moving. 

• Friction acts as a resistance, trying to stop objects from moving. The rougher the surfaces, the more friction there is, and the faster the object will stop.
• For example, a carrom piece and a rolling ball.

Frictional force

1. Aim: To observe how friction affects smooth and rough surfaces when they are rubbed against each other.

2. Requirements: Two pieces of smooth paper, two pieces of sandpaper (rough surface)

3. Procedure:

I. Rubbing Smooth Paper:

• Take the two pieces of smooth paper and rub them against each other.
• Observe how easily they move against one another.

II. Rubbing Sandpaper:

• Now, take the two pieces of sandpaper and rub them against each other.
• Notice the difference in how hard it is to rub the rough surfaces compared to the smooth ones.

4. Conclusion:

• The smooth paper moves easily because there is less friction between the two smooth surfaces.
• The sandpaper is harder to rub together because the rough surfaces create more friction. This experiment shows that friction is less between smooth surfaces and greater between rough surfaces.