Motion
A combination of both speed and direction
Velocity
These are the two main forces that resist changes in motion.
Gravity and Friction
What two things must happen in order for work to occur
A force must be applied to cause motion in an object.
The pivot point on a lever
Fulcrum
This is a bar that rotates around a pivot point.
Lever
The speeding up, slowing down, or changing direction of an object.
Acceleration
These forces are equal in size and opposite in direction. You don't see any motion
Balanced Forces
This is energy in motion. The roller coaster is going down the hill.
Kinetic Energy
How well a machine does the job you want it to do.
Efficiency
A rigid rod that passes through a round object
Wheel and Axle
How fast an objects position changes over time.
Speed
An object in motion will stay in motion and an object at rest will stay at rest until acted on by another force.
Newton's First Law of Motion
This is energy that is being stored up. The roller coaster is climbing the hill.
Potential Energy
The object moved by the machine
Load
A grooved wheel with a rope running along the groove
Pulley
The tendency of an object to resist a change in motion.
Inertia
This is the name of the dude that studied motion and came up with three laws.
Sir Isaac Newton
This says that energy can not be created or destroyed. It's just simply transferred from one form to another.
Law of Conservation of Energy
What is the reason we use simple machines?
To make work easier
An inclined plane wrapped around a center post
Screw
The more mass an object has the more inertia is has. This gives the object more ___________.
Momentum
This says that the acceleration rate of an object depends on the objects mass.
Newton's Second Law of Motion
The ability to perform work
Energy
The force you apply to a machine
Effort
This simple machine has one or two sloping sides and transfers a downward force outward.
Wedge