Vocabulary
The ability to cause change or do work.
What is energy?
the type of potential energy an object has due to it's`height above the ground
What is gravitational potential energy?
If there are two objects with the same mass, then the one that is _________________ will have more kinetic energy.
Moving Faster
the kinetic energy plus the potential energy due to position stored in an object
What is mechanical energy?
State the law of conservation of energy.
Energy can neither be created nor destroyed. It can only be transformed into other forms of energy.
Stored energy due to position
What is potential energy?
the gravitational potential energy equation
PE = mgh
If two objects are moving at the same speed, then the one with __________ will have more kinetic energy.
more mass
Fill in the blank: _____________ energy can be all potential, all kinetic or some of both.
Mechanical energy can be all potential, all kinetic or some of both.
Where does a roller coaster cart have the most potential energy? the least?
most at the top, least at the bottom.
energy an object has due to motion
the variables potential energy relies on (full names, not just letters)
mass, (acceleration due to) gravity, and height
Fill in the blank: Kinetic energy depends on the ______________ and _______________ of the object.
Mass and speed.
Fill in the blanks: As objects move closer to the ground, they lose ________________ energy and that energy becomes more __________ energy.
As objects move closer to the ground, they lose (gravitational) potential energy and that energy becomes more kinetic energy.
Fill in the blank: ____________ is changed from one form to another.
Energy
the total kinetic and potential energy an object has
What is mechanical energy?
Two apples are hanging from a tree. How can you tell which one has more potential energy?
The apple that's higher up will have more potential energy.
1. A bowling ball and a soccer ball are both moving at the same speed. Which one has more kinetic energy? Why?
The bowling ball, because it has more mass.
Give an example of an object with mechanical energy.
Examples from your notes: a helicopter soaring through the sky, a bumblebee whizzing past your head, or a baseball thrown to a catcher
Describe the energy transformation as you throw a ball up.
Kinetic energy changes to potential energy.
the unit energy is measured in.
What is the joule?
Your pencil and notebook are both on the table. Which has more potential energy? Explain.
The notebook because it has more mass than the pencil.
If two objects are moving at the same speed, how could one have more kinetic energy than the other?
One has more mass.
What happens to the mechanical or total energy in any situation?
It stays the same.
If total or mechanical energy stays the same then no energy is created or destroyed.