Potential and Kinetic Energy
The energy associated with motion
kinetic
Something has to move
What is the unit for work?
joules
This is an example of a compound machine
bike, scissors
Name three types of friction
Static
Rolling
Fluid
This energy depends on height
These are examples of each type of lever in order (first, second, and third class)
seesaw, joint, fishing pole
The formula for work
w = f x d
These are five kinds of energy other than kinetic and potential
chemical
mechanical
thermal
nuclear
light
acoustic
A newton-meter as a measure of work is called this
joule
This is the main difference between kinetic and potential energy
Kinetic is in motion
Potential is stored energy
This is what a machine has to do to be called a machine
it has to make work easier
This is the force exerted by the person
input force
this is the force exerted by the machine
output force
This is the fixed point that the lever pivots around
fulcrum
When a soccer ball is kicked, this is when it has the greatest potential energy
at highest point (top of kick)
joint (shoulder, elbow, knee)
These are the units for work, power, and force
joules
watts
Newtons
chemical to heat (thermal)
or
heat to chemical
This could be considered an inclined plane wrapped around a cylinder
screw
In throwing a basketball, this is the point where it has the least amount of potential energy
at the end when it lands or is caught
In your head, these would be considered wedges (think of the shape of an ax)
teeth
In order to do maximum work on an object, the force exerted must go in this direction
same direction as the object's motion
In your body, most of your muscles and bones are this part of a machine.
lever
These are the four types of friction
static
rolling
fluid
sliding