G9 Kinematics – definitions of kinematic variables; equations of motion; graphical representation of motion and its interpretation.
G7 Laws of conservation – law of conservation of energy
G9 Dynamics – Newtons laws; resultant force and use of F ma
Course of the Lesson
Planned stages of the lessonPlanned activities at the lessonResources
Beginning
(16 min)Organiztion moment (1 min)
Greetings the students.
Check students homework (10 min)
Allow time for students to complete previous lesson problems and ask questions.
Revision the derivation of Bernoullis equation (5 min)
Use slide 1-4
ppt
Middle
(60 min) Part 2 Demonstration (10 min)
Torricellis Equation
Use a bottle with three holes in the side
Close the holes with scotch tape
Fill the bottle with water
Pull the tape off
Observe the velocity of the water coming out of each of the holes.
Discuss the demonstration
As the height above the hole increases, the velocity of the water coming out of the hole increases.
Thus we are looking at the relationship between the height of the hole and the velocity of the water coming out of the hole.
Part 3 Announcement of topic and lesson objectives (2min)
Please write down todays topic in your book (slide 7)
What do you think the lesson objectives are? (slide 8)
Part 4 Presentation (13 min)
These are the assumptions in Torricellis equation. We assume that we are working with an ideal fluid. (slide 9)
It is incompressible
It has zero viscosity
Its flow is laminar
There is no lid on the container, otherwise a vacuum will be created as the water flows out
Explain the derivation of Torricellis equation (slide 1011)
Torricellis equation is the
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