Motion and Energy

1
Motion and Energy

• Motion- An object is in Motion when
  __________________________________________________
  __________________________________________________
  ____

2
Motion and Energy

• Motion- An object is in Motion when
• a place or object that can be used to determine
  if an object is in motion.

3
Examples of Newtons 1st Law
a marble will not move unless forced.
once a marble is moving, it doesnt stop
until forced to!
4
if you dont wear your seatbelt, you have no
force to stop you when the car crashes!
since you keep moving, you fly through the
windshield! (and DIE)
5
Motion and Energy

• Speed
• __________________________________________________
  _____

6
Motion and Energy

• Speed
• Distance divided by Time

7
Motion and Energy

• Velocity - _______________________________________
  _____________

8
Motion and Energy

• Velocity
• The speed of an object moving in a particular
  direction

9
Motion and Energy

• Velocity
• The velocity of the airplane is defined by both
  its direction and speed.

10
Motion and Energy

• Velocity
• The rate at which the velocity of an object
  changes is called acceleration.
• That means that an object is accelerating
  whenever it speeds up, slows down or changes
  direction.

11
Motion and Energy

• A Force is a push or pull.
• Unbalanced Force acting on an object will change
  the objects motion.
• Equal forces that act on an object in opposite
  directions are called Balanced Forces.

12
Motion and Energy

• Newtons Laws of Motion
• First law Motion- ________________________________
  ____________________

13
Motion and Energy

• Newtons Laws of Motion
• First law Motion-
• objects at rest stay at rest unless a force acts
  upon it.
• In two unbalanced forces, friction, air
  resistance, slow it down.

14
Motion and Energy

• __________ measures an objects tendency to
  remain at rest or keep moving. Inertia is
  related to mass.

15
Motion and Energy

• Inertia measures an objects tendency to remain
  at rest or keep moving. Inertia is related to
  mass.

16
Motion and Energy

• Newtons Second Law - ____________________________
  ________________________

17
Motion and Energy

• Newtons Second Law
• The net force on an object is equal to the mass
  of the object multiplied by its acceleration.

18
Motion and Energy

• Force Mass x Acceleration
• Weight and mass are not the same thing. Weight
  changes when the acceleration due to gravity
  changes.

19
Newtons 2nd Law of Motion
Force mass X acceleration

x
This means that the magnitude of the force is
decided by how big and heavy an object is, and
how fast it is moving!
20
This makes sense big, heavy objects have a lot
of force. An elephant doesnt have to move fast!

• Small objects can have a lot
• of force if they are
• moving FAST.
• a bullet thrown by hand does nothing,
• but shot at high speed it can kill!

21
Things dropped from a moving vehicle dont
fall straight down!
50 N
50 N
10 N
they keep moving forward until another force
stops them!
22
Motion and Energy

• Mass remains the _________ no matter what
  weight is.

23
Motion and Energy

• Mass remains the same no matter what weight
  is.

24
Motion and Energy

• Third Law of Motion - ___________________________
  ___________________

25
Motion and Energy

• Third Law of Motion
• for every action there is an equal and opposite
  reaction.

26
Newtons Third Law of Motion For every action,
there is an equal and opposite reaction.
Translation If you push, you also get pushed
back!
27
This is why we are able to jump-- when we
push the ground, it pushes back!
28
Motion and Energy

• Using the second law equation, the object with
  the larger mass has the smaller
  ________________________
• if the same force is applied.

29
Motion and Energy

• Using the second law equation, the object with
  the larger mass has the smaller
• acceleration rate
• if the same force is applied.

30
Motion and Energy

• The three laws of motion describe how any object
  moves when
• ___________
• acts on it.

31
Motion and Energy

• The three laws of motion describe how any object
  moves
• when
• force
• acts on it.

32
Motion and Energy

• Types of Energy
• Potential Energy -
• _____________________
• Example

33
Motion and Energy

• Types of Energy
• Potential Energy -
• Stored energy
• Example
• ROLLER COASTER AT
• TOP OF HILL

34
Motion and Energy

• Types of Energy
• Kinetic Energy
• ________________________
• Example

35
Motion and Energy

• Types of Energy
• Kinetic Energy
• Energy in Motion
• Example
• ROLLER COASTER ROLLING DOWN THE HILL