# FRICTIONAL FORCE

SUBJECT: BASIC SCIENCE AND TECHNOLOGY – FRICTIONAL FORCE

TERM: THIRD TERM

WEEK: WEEK 6

THEME: YOU AND TECHNOLOGY

CLASS: PRIMARY 6

TIME: 40 MINUTES

TOPIC: FRICTIONAL FORCE

UNITS:

• Meaning of Friction
• Effect of Friction
• Reduction of friction

PERFORMANCE OBJECTIVES

At the end of this Topic, Student should be able to:

1. Explain friction
2. Mention the application of friction
4. Explain ways that frictional force can be reduces

TEACHING AND LEARNING MATERIALS

• Grease oil
• Stone
• Nail
• wood
• Whiteboard/Chalkboard
• Explanatory posters/pictures
• Explanatory videos

TEACHING AND LEARNING METHODS

• Explanation
• Discussion

REFERENCE MATERIALS

• NERDC Basic Education Curriculum for primary schools.
• Universal Basic Education Curriculum for primary schools.
• Lagos State Scheme of Work.
• Online Materials.
• Basic Science and Technology for Primary Schools.

CONTENT

FRICTIONAL FORCE

Frictional Force is a force that stops things from moving easily. It is friction that enables a nail to stay in a hole and hold two piece of wood together. It is friction that makes it possible for fire to occur by striking the two surfaces of two stones.

EFFECT OF FRICTIONAL FORCE

The effect of frictional force is that it make writing easier on paper.

It make pushing or pulling difficult

1. It makes it possible for vehicle to  stop when break is applied
2. It prevents car wheels from slipping on a tarred road
3. It make a nails to hold pieces of wood together
4. It prevent us from slipping when walking
5. It prevent the bicycle wheel from slipping  on a muddy road

1. It causes ware and tears in shoe soles, car tyres, car engines
2. It make pushing difficult.
3. It makes pulling difficult.
4. It produces heat in car engines.

REDUCTION OF FRICTION

• Make use of sand paper on the surface of wood.
• The use of ball bearing and rollers.
• Make use of lubricants such as grease and oil.

PRESENTATION

• The Teacher revises the previous lesson.
• The Teacher introduces the topic.
• The Teacher explains the lessons.

LESSON EVALUATION

• What is frictional force?
• Mention three advantages of friction
• Mention three disadvantages of friction
• Mention three ways of reducing friction

CONCLUSION: the teacher summarize the lesson.

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