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Energy

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Energy What are potential and kinetic energy? Energy is the ability to make things move The seven types of energy Chemical - gasoline, Light flash light ... – PowerPoint PPT presentation

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Title: Energy


1
Energy
  • What are potential and kinetic energy?

2
Energy
  • is the ability to make things move

3
The seven types of energy
  • Chemical - gasoline,
  • Light flash light,
  • Heat burner on a stove,
  • Nuclear - sun,
  • Mechanical - car,
  • Sound music on the radio,
  • Electrical - lightning

4
Energy
  • is NEVER created or destroyed!
  • can only be STORED or TRANFERRED.

5
This car uses a lot of energy
Batteries store energy!
We get our energy from FOOD!
Even this sleeping puppy is using stored energy.
6
Definitions
  • Kinetic Energy the energy of motion
  • Potential Energy stored energy

7
How is all energy divided?
All Energy
Potential Energy
Kinetic Energy
8
Examples of Potential Energy
A stretched rubber band..
Water at the top of a waterfall..
YoYo held in your hand..
A drawn Bow and Arrow
9
A Roller Coaster
  • A roller coaster speeds along its track. It
    has kinetic energy because it is moving.

10
  • Substances like wood, coal, oil, and gasoline
    have stored energy because of their chemistry
    they can burn
  • Stored energy is potential energy

11
  • Potential Energy can be changed into Kinetic
    Energy
  • Also Kinetic Energy can be changed into Potential
    Energy

12
  • The higher an object, the more potential energy.
  • The more mass an object has, the more potential
    energy it has.

13
  • Which object has more potential energy?

B
A
14
ANSWER
A
This brick has more mass than the
feather therefore more potential energy!
15
Changing an objects height can change its
potential energy.
  • If I want to drop an apple from the top of one of
    these three things, where will be the most
    potential energy?

A
C
B
16
ANSWER
A
  • The higher the object, the more potential energy!

17
When these objects move at the same speed, which
will have more kinetic energy?
18
ANSWER
The semi- truck has more mass therefore, more
kinetic energy!
19
  • An object has the MOST kinetic energy when its
    movement is the GREATEST.
  • When an object has the LEAST potential energy, it
    has the MOST kinetic energy.

20
A water bottle is knocked off a desk.When does
the bottle have the MOST kinetic energy?
  • A. At the top of the fall.
  • B. In the middle of the fall.
  • C. At the bottom of the fall.

21
  • C. At the bottom of the fall.
  • It has the most kinetic energy when its movement
    and speed are greatest, which is at the bottom of
    the fall right before it hits the ground.
  • When an object has the LEAST potential energy is
    when it has the MOST kinetic energy.

BrainPop
22
Roller Coasters
  • When does the train on this roller coaster have
    the MOST potential energy?
  • AT THE VERY TOP!
  • The HIGHER the train is lifted by the motor, the
    MORE potential energy is produced.
  • At the top of the hill the train has a huge
    amount of potential energy, but it has very
    little kinetic energy.

23
  • As the train accelerates down the hill the
    potential energy is converted into kinetic
    energy.
  • There is very little
  • potential energy at the bottom of the hill, but
    there is a great amount of kinetic energy.

24
  • When does the train on this roller coaster have
    the MOST kinetic energy?
  • (When is it moving the fastest?)
  • (When does it have the LEAST potential energy???)
  • At the bottom of the tallest hill!

25
  • Animated Roller Coaster

26
Notes
  • All energy is divided into two types potential
    and kinetic.
  • Potential Energy The energy stored in an object.
  • Kinetic Energy The energy of a moving object.
  • Energy is never created or destroyed. It is
    always stored or transferred.
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