Electricity
Energy
Machines
Laws of Motion and Forces
Describing Motion
100
What are the two types of electricity?
Static and current
100
An energy transformation is?
When energy is transformed between states
100
What is a lever?
A simple machine that pivots around a fixed point
100
What is friction?
The force that resists the movement of touching objects
100
What is a reference point?
The starting point you use to describe the position of an object
200
What is a circuit that has multiple paths for electricity to go through?
Parallel circuit
200
What is radiant energy?
Energy carried by electromagnetic waves
200
What is a wedge?
An inclined plane that moves
200
What is the difference between a non-contact and contact force?
Non-contact doesn't need to touch to be in effect, while contact does
200
What is motion?
The process of changing position
300
What is the charge of an electron?
Negative
300
What is thermal energy?
The sum of the kinetic and potential energy in the particles that make up an object
300
What is a complex machine?
Multiple simple machines working together
300
What is Newtons's First Law of Motion nicknamed?
The Law of Inertia
300
What is velocity?
The speed and direction of a moving object
400
Electricity flows from _____ charge to _____ charge
Negative to positive
400
What is work?
The transfer of energy when an object moves in the direction of a force
400
What is efficiency?
The ratio of output work to input work
400
What equation does Newton's second law state?
F = ma
400
What is acceleration?
The measure of the change in velocity during a period of time
500
The resistance of a wire is affected by?
Length and thickness
500
What is the type of energy in fossil fuels?
Chemical energy
500
What is the highest efficiency a machine can ever have (theoretically if friction didn't exist)?
100%
500
Friction turns kinetic energy into ____ energy
Thermal
500
What are the three ways velocity can change?
A change in speed, a change in direction, or both
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