Instructions
Read the information below about friction and air resistance. Then, answer the questions that follow.
Friction
Friction is a force that opposes the motion of an object. It occurs when two surfaces come into contact with each other. There are different types of friction:
- Static Friction: The force that keeps an object at rest.
- Kinetic Friction: The force that acts on an object in motion.
Friction can be helpful, like when you rub your hands together to stay warm. However, it can also make it harder to move objects.
Air Resistance
Air resistance is a type of friction that acts on objects as they move through the air. It is sometimes called drag. The faster an object moves, the greater the air resistance it experiences. This force can slow down moving objects, such as a falling feather or a skydiver.
Questions
- What is friction?
- What are the two types of friction mentioned in the text?
- Give one example of a situation where friction is helpful.
- What is air resistance?
- How does air resistance affect a falling object?
- Can air resistance ever be beneficial? Give an example.
Activity
Now, conduct a simple experiment:
- Take a small piece of paper and a heavier object like a book.
- Drop both from the same height at the same time. Observe what happens.
- Write your observations below.
What did you learn about air resistance from this experiment?