1-Lesson Title : Pulleys
2-Lesson description: A pulley is a wheel with a groove where a rope
can go over. It is used for lifting objects.
3-Learning objectives: Pupils should be able to:
1.
2.
3.
4.
define pulleys and types of pulley.
identify pulleys as a simple machine
name examples of pulleys in real life
explain that simple machines, including pulleys, make work
easier
5. conduct experiments to demonstrate that pulleys make work
easier
4- Learning Activities:
Activity no. 1
‫اسم النشاط‬
Investigating the effort needed to lift a load with
different types of pulleys.
‫الهدف من النشاط‬
To investigate how different types of pulleys help
us to do work
‫الزمن‬
‫ التميز الخبرة‬/‫أوجه اإللهام‬
‫العمليات في كل خطوة‬
‫الخطوات‬
‫المحسوسة‬
5 min
Let pupils observe
Explain what a fixed pulley is.
pulleys that are found
at the top of flag poles
or curtain blinds
20 min
inferring
Let pupils lift loads
Explain what movable pulleys and
using these pulleys and
pulley systems are and where can
they find these pulleys?
20 min
1
period
infer their
characteristics.
Uses of Observing
1-Set up the apparatus
Get pupils to perform A.B.P 14-15
spring
in the diagram in the
balance
A.B.P 14 (use the 200 g
Inferring
mass as the load)
2- pull the spring
balance to lift 200g
mass using the single
communicating fixed pulley and observe
the least effort needed
to lift the load and
record it in the table.
repeat using different
loads.
3- repeat step 2 with a
single movable pulley
and pulley system.
4- from your
investigation, draw
conclusions about the
effort needed to lift a
load using different
types of pulleys.
Applying
Use an empty cardboard Working Model Of Pulley Lift
box ,string and pulley to
build the model of pulley
lift .
5- Learning Time:
Monday (21/2): Aim # 1-3
Tuesday (22/2) : activity 1
Sunday (27/2): Working Model of Pulley Lift
tuesday (1/3) : Video
6-Materials & Resources:
White board, course book, retort stand, two pulleys, spring balance,
string, 200g mass, 400 g mass, 600 g mass.
7-Assessment tools: worksheet, asked oral questions
8-Reflection and feedback