law of conservation of energy : a principle that states that energy is neither created nor...
TRANSCRIPT
Key Terms
Law of Conservation of Energy: a principle that states that energy is neither created nor destroyed, it simply changes form
Kinetic Energy: the energy of motion Potential Energy: The energy stored in an
object or substance. Gravitational Potential Energy: the
potential energy that exists between two objects that exert a gravitational pull on each other
What is Energy?
Energy can be categorized into two general types of energy. › Potential energy is energy that is not
being used, so is often referred to as stored energy.
› Kinetic energy is the energy of matter in motion
Batteries store energy!
This car uses a lot of energy
We get our energy from FOOD!
Even this sleeping puppy is using stored energy.
Examples of Potential Energy:A stretched rubber band..
Water at the top of a waterfall..
Yo–Yo held in your hand..
A drawn Bow and Arrow…
Energy in Action Energy in Action
• Remember ENERGY is never
CREATED or DESTROYED…it
can only be STORED or
TRANSFERRED!!
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?
AB
C
ANSWER
The higher the object, the more potential energy!
A
Potential Energy Converted to Kinetic Energy…
When stored energy begins to move, the object now transfers from potential energy into kinetic energy.
Examples of Kinetic Energy:
When these objects move at the same speed, which will have more kinetic energy?
ANSWER
The semi- truck has more mass; therefore, more kinetic energy!
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.
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
What causes energy? The Law of Conservation of Energy
states that “energy can neither be created nor destroyed. It is simply converted from one form to another.”
Newton’s Cradle. The kinetic energy of the ball on the left is transferred to the next ball, which transfers the energy to the next ball, so on down the line. When the last ball is hit, the kinetic energy causes it to kick out from the others. It swings back with kinetic energy, which it thus returns to the next ball and the progression continues.
Newton's Cradle