Law of Conservation of Energy
What is the law of conservation of energy?
The total energy of a closed system where the energy remains constant
What is Kinetic energy?
The energy that objects possess due to motion
stored energy that can be used later
what is mechanical energy?
the sum of any kinetic energy and all the forms of potential energy in a system
What is the energy transformation of a burning candle?
Chemical->Thermal->Chemical->Thermal
What is a "closed system"?
What two things does an objects kinetic energy depend on?
speed and mass
What is elastic potential energy?
stored energy used to do work on an arrow, sending it toward a target
What is the most common force found in a mechanical system?
Gravity
What is the energy transformation in the Human body?
Chemical->Heat
What is the idea of conservation?
simply what is meant when someone says that energy can neither be created or destroyed, only changed from one form to another
The _______ the object's mass, the more kinetic energy it has when moving and thus the more work it can do
greater
What is chemical potential energy?
energy stored in food molecules
Can mechanical energy relate to other forms of energy?
Yes
What is the energy transformation in a flashlight?
Chemical->Electrical->Heat and Light
What are 2 general forms of energy?
kinetic energy and potential energy
To do more work you need to _______ the object's kinetic energy
increase
What is gravitational potential energy?
potential energy due to an object's position within a gravitational field
Mechanical energy is a ___________ of energy in a mechanical system?
Combination
What is the energy transformation in a campfire?
Chemical->Heat and Light
What does the total amount of energy within a system during energy transformations?
remains the same
What is the formula for finding the kinetic energy of an object?
KE= 1/2 mv2
What is potential energy sometimes called?
energy of condition or energy of position
Mechanical energy involves ______ and the ________ of an object?
motion and position
What is the energy transformation in a windmill?
Kinetic->Electrical and Mechanical