Transcript Three Laws of Motion

In Depth
BALLOONS VS. AIRPLANES
What I Need
 Form the room like a college classroom.
 Have all eyes and ears focused on my two
cheerleaders.
 Each team of cheerleaders will get five
minutes to explain why the airplane or
balloon is the best.
 Then each team of cheerleaders gets three
minutes for a counter argument
 The audience decides who wins
Team Airplane
Team Balloon
Counter Argument time!!!!
The Winner Is…
And Now…
A brief history on the Hot Air
Balloon
“Historians agree, however, that the
first true powered flight
with humans on board was in a hot
air balloon” –AE Module 1
The first hot air balloon
ride occurred in France
during the late 18th
century. On November
21, a 25 minute flight
was made over Paris by
Pilatre d’Rozier and
Francois d’Arlandes.
However, these men did
not invent the balloon.
Montgolfier Brothers….
 Once upon a time, two well-educated men
were reading about properties of air. They get
the idea that “Hey! We should play with fire!”
They took a bag of silk, lit a fire underneath
the bag, and slowly watched it rise because of
the buoyancy. Why did the bag rise?
HEAT RISES!!!!! (no way)
What is Buoyancy?
Buoyancy
 The Hot air balloon is buoyant because it is
filled with hot air. Since heat rises, the
balloon is able to float. But how does it
generate hot air?
Example Time!!!!!!!!!!!!
Brief History on the
Airplane
Deadalus and Icarus
 Once upon a time, two prisoners, a father and
son, named Icarus and Deadalus. Both men were
prisoners on an island. They eventually grew
tired of being imprisoned, and planned an
escape. They covered their arms with wax and
feathers, and soon flew off into the unknown.
However, Icarus’ father told him not to fly too
close to the sun, because the wax would melt,
but like every teen, he did not listen to his
parent. Soon he flew too close, the wax melted,
and he died.
Happy History Time.
 Objectives: Who was Daniel Bernoulli and Sir
Isaac Newton?
 Can anyone tell me?
Daniel Bernoulli
 Discovered the relationship between pressure
and fluids in motion. It became the
cornerstone of the Airfoil Lift Theory.
Airfoil Lift Theory
 Daniel found that like air in motion, fluid had
a constant pressure. When fluid is
accelerated, pressure drops. Thus, wings in an
airplane are designed to make air flow go
faster over the top of the wing.
 As velocity increases, pressure decreases.
 Can you provide examples?
Sir Isaac Newton
 In my last class, I briefly went over the Three
Laws of Motion.
 Can you recall any of them?
Three Laws of motion in
Depth
An object at rest will remain at rest unless
.
acted upon by an outside force
 Or an object will go about it’s merry way
unless acted upon by an outside force.
 In my last example, I had Morikawa hold my
rocket in motion, my hand was the outside
force that stopped it from going it’s merry
way.
 Another example: if an F-22 is flying towards
a target, shoots at the target in motion, and
the target goes flying downwards, the F-22
ammo is the outside force to that target.
F=M*A
 The net force of an object is equal to the rate
of change
 where F is the net force applied, m is the mass
of the body, and a is the body's acceleration.
Thus, the net force applied to a body
produces a proportional acceleration. In other
words, if a body is accelerating, then there is
a force on it.
For every action, there is an equal and
opposite reaction
 In every interaction, there is a pair of forces
acting on the two interacting objects. The
size of the forces on the first object equals the
size of the force on the second object. The
direction of the force on the first object
is opposite to the direction of the force on the
second object. Forces always come in pairs equal and opposite action-reaction force
pairs.
ADVENTURE TIME!!
Objectives
 Put the chairs on the SIDE of the room.
 Prepare for your minds to be blown