GRADE 8 PHYSICS HANDOUT
Topic: Friction - A Force That Opposes Motion
Student Name / Group: ______________________
Class: 8th Grade | Duration: 40 min
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1. What is Friction?
Friction is a force that opposes motion between two surfaces in contact.
- It always acts opposite to the motion of an object.
- Friction is everywhere in daily life; it helps us walk, drive cars, and hold objects.
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2. Types of Friction
Static Friction:
Acts on objects that are at rest. Prevents the object from starting to move. Example: Pushing a
heavy cupboard. Strongest type of friction.
Sliding Friction:
Acts when an object slides over a surface. Slows down the sliding object. Example: Sliding a
wooden box across the floor. Medium strength friction.
Rolling Friction:
Acts when an object rolls on a surface. Weakest type of friction. Example: Cricket ball rolling on the
ground. Rolling objects move farther than sliding objects because rolling friction is weaker.
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3. Observation Activity
Materials: Wooden box, Cricket ball, Flat floor
Instructions:
1. Teacher will push both objects from the same starting line.
2. Observe carefully: which object moves farther, which stops earlier.
3. Fill in the table below:
Object | Type of Motion | Distance Travelled | Friction Type
Wooden Box | __________ | __________ | __________
Topic: Friction - A Force That Opposes Motion
Student Name / Group: ______________________
Class: 8th Grade | Duration: 40 min
---
1. What is Friction?
Friction is a force that opposes motion between two surfaces in contact.
- It always acts opposite to the motion of an object.
- Friction is everywhere in daily life; it helps us walk, drive cars, and hold objects.
---
2. Types of Friction
Static Friction:
Acts on objects that are at rest. Prevents the object from starting to move. Example: Pushing a
heavy cupboard. Strongest type of friction.
Sliding Friction:
Acts when an object slides over a surface. Slows down the sliding object. Example: Sliding a
wooden box across the floor. Medium strength friction.
Rolling Friction:
Acts when an object rolls on a surface. Weakest type of friction. Example: Cricket ball rolling on the
ground. Rolling objects move farther than sliding objects because rolling friction is weaker.
---
3. Observation Activity
Materials: Wooden box, Cricket ball, Flat floor
Instructions:
1. Teacher will push both objects from the same starting line.
2. Observe carefully: which object moves farther, which stops earlier.
3. Fill in the table below:
Object | Type of Motion | Distance Travelled | Friction Type
Wooden Box | __________ | __________ | __________
