| Types of Energy | Energy Conservation | Energy and Work/ Energy and Heat | Simple and Complex Machines | Machines and Work/ Efficiency/ Newton's Law |
|---|---|---|---|---|
|
Kinetic Energy
What is an energy an object has because of its motion?
|
energy can be transferred from one form to another, but it cannot be created or destroyed
What is law of conservation of energy?
|
transfer of energy that occurs when a force makes an object move in the direction of the force while the force acts on the object
What is work?
|
What is simple machines?
machines that do work using one movement
|
What is efficiency?
ratio of output work to input work
|
|
type of potential energy stored in an object due to its height above the surface.
What is gravitational potential energy?
|
What is energy transformation
|
What is the unit for force?
joules
|
What are the 6 simple machines?
inclined plane, screw, wedge, lever, wheel and axle, and pulley
|
What is the efficiency equation?
efficiency=output work divided by input work multiplied by 100 percent
|
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chemical energy is only potential energy while thermal is both potential and kinetic energy.
What is the difference between chemical and mechanical energy?
|
What energies are used in roller coasters?
gravitational potential energy and kinetic energy
|
What is the equation for work?
work in joules equals force times distance
|
What is input and output force?
input force- force you put on a machine
output force- the force the machines do on an object |
What is the second Newton's Law?
the change in motion in a motion in an object is in the same direction as the total, or net force on the object
|
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sound energy, seismic energy, and radiant energy
What are three energy that comes from waves that the textbook mentions?
|
When a plant carries photosynthesis it transforms from what energy to what energy?
from radiant energy to chemical energy |
How does car create heat?
the friction between car's tires and the road
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What is a complex machine?
two or more simple machines working together
|
What is third Newton's Law?
if one object applies a force on a second object, the second object applies an equal and opposite force on the first object
|
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Seismic energy
What kind of energy is Earthquake?
|
Where do we get the electric energy we use today?
the plants that have died millions of years ago and turned to fossils
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What is heat waste energy?
thermal energy moving from a region of higher temperature to a region of lower temperature
|
What are all the simple machines that bicycle have?
pulley, lever, and wheel and axle
|
What is the relationship between changing distance and force?
the input force decrease, but the distance it is applied is increased
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