# cueFlash

## Glossary of Bob Jones Science 6th Chapter 9

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The ability to do work...
energy.
Stored energy
Potential Energy
Energy due to motion
Kinetic Energy
The ability to make something move
Mechanical energy
The change of an object's position
Motion
A fixed, unmoving object
reference point
The length something travels
Distance
Distance divided by time
Speed
Speed at one particular moment
Instantaneous speed
Speed divided by time
Distance
The distance an object moves over a given amount of time in a certain direction
Veloctity
The change in velocity during a period of time
Acceleration
A push or pull
Work
The Force that keeps objects from moving against other objects
Friction
Mass and the velocity determine...
Momentum
He formulated the three laws of motion
Sir Isaac Newton
First Law of Motion...
An object tends to stay at the same velocity unless another force causes it to change.
The resistance to change in motion...
Inertia
The pull of one object on another
Gravity
The amount of matter in something
Its Mass
The gravitational force on somthing
Weight
Second Law of Motion
Force is equal to an object's mass and the acceleration of the object.
Mass times Acceleration
Force
Third Law of Motion
When one object exerts a force on another object the second object reacts by exerting an equal force back on the first object
A force acting on something as it moves a certain distance
Work
Work is measured in...
Joules.
Force is measured in...
Newtons.
Force times distance
Work
Any object that makes work easier
Machine
The force applied to a simple machine
Effort Force
The force that works against the effort
Resistance Force
A bar that turns on a point
Lever
The spot that a lever turns on
Fulcrum
A grooved wheel with a rope used to raise or lower something
Pulley
This simple machine makes work easier by changing the direction of the force or by reducing the amount of force needed
Pulley
The decrease in effort needed to move an object
A doorknob is a ...
wheel and axle
A block and tackle contains...
2 fixed pulleys and a moveable pulley
A flat slanted surface
Inclined plane
Two inclined planes put together
Wedge
An inclined plane wound around a cylider
Screw
Two or more simple machines put together to make work even easier
Compound machine
Slide...
inclined plane