Previous LessonExplain Buoyant force? An upward force that happened when an object immersed

partially or wholly in liquid.

FB=ρVgFB=Buoyant Force

ρ=density of fluid

V=volume of fluid displaced

g=gravity

SI Unit = Newton(N)

What is Archimedes’ Principle?“when an object is wholly or partially immersed in

the fluid, it experienced buoyant force equal to the weight of the fluid displaced”

ApplicationSubmarine Hot air balloon

Learning OutcomesStates Bernoulli's’ PrincipleExplain that a resultant force exist due to a

difference in fluid pressureDescribe applications of Bernoulli’s PrincipleSolve problem involving Bernoulli’s Principle

Learning ActivitiesDemonstration to explain the Bernoulli's’

PrincipleGroup discussion about application of

Bernoulli's’ principle and problem solving followed by presentation by students.

Review today lessonReview Chapter 3 (Forces and Pressure)

Now Showing 18xyz

What can you observe from the video?Why the heavy object such as aeroplane can

fly??

Activity 1

DemonstrationPing-Pong Ball

Venturi Tube

What is the Bernoulli's’ Principle??? When the speed of fluid high/increase, the pressure of

fluid low/decreases

When the speed of fluid low/decrease, the pressure of fluid high/increase.

Lifting Force

Weight

Thrust

Drag

How about resultant Force??

Video 1Video 2

Resultant force exists because of difference in fluid pressure between two surfaces.

ApplicationBunsen BurnerInsecticide sprayCarburetor

Problem SolvingSolve problems in the worksheet given

Learning OutcomesExplain Bernoulli's Principle When the speed of fluid high/increase, the pressure of fluid

low/decreases When the speed of fluid low/decrease, the pressure of fluid

high/increase.

Explain how a resultant force exist Resultant force exists because of difference in fluid pressure

between two surfaces.

Applications of Bernoulli’s Principle Bunsen Burner Insecticide spray Carburetor

Next LessonChapter 4 ( Heat)Understanding Thermal Equilibrium

THANK YOU &SEE YOU AGAIN NEXT WEEK