PULLEYS

SUBJECT: BASIC SCIENCE AND TECHNOLOGY

TERM: THIRD TERM

WEEK: WEEK 4

THEME: YOU AND TECHNOLOGY

CLASS: PRIMARY 6

TIME: 40 MINUTES

TOPIC: PULLEYS

UNITS

• Definition of  pulley
• Example of pulley
• Types of pulley
• Application of pulley

PERFORMANCE OBJECTIVES

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

1. Know simple pulley machines.
2. Uses of pulley machines.
3. Know the difference between fixed and movable pulleys.
4. Make and use pulley machines to do some work.

TEACHING AND LEARNING MATERIALS

• Plank
• Ladder
• Make use of stair case
• Whiteboard/Chalkboard
• Explanatory posters/pictures
• Explanatory videos

TEACHING AND LEARNING METHODS

• Explanation
• Discussion
• Questions and answer

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

              DEFINITION OF PULLEY

 A pulley is simple machine consisting of a wheel with a groove in which a rope can run to change the direction or point of application of a force applied to the rope.

TYPES OF PULLEY

• Fixed pulley: it is a type of pulley with a rope passing round a groove in the wheel’ circumference. It is used to raise a bucket of water from a well.
• Movable pulley: it is a type of pulley with a movable wheel. The pulley hangs freely as the rope passes under it.

  EXAMPLES OF PULLEY MACHINES

• For towing vehicle
• Crane
• A lift
• Hoist

APPLICATIONS OF PULLEY

• For towing vehicle
• To lift building materials
• Used in ship to offload goods
• Use in Elevator
• Used in curtains at a theatre
• Flagpole use pulley to hoist flag up and bring it down.
• A bulldozer make use of pulley

PRESENTATION

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

LESSON EVALUATION

• Give three examples of a simple pulley.
• State two application of a pulley machine.
• Differentiate between fixed and movable pulley.

CONCLUSION: the teacher summarize the lesson.