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Speed
S=Distance/Time
unit= m/s
Acceleration
A=change in speed/time
unit= m/s or m/s squared.
Work
What is it measured in?
=force x distance
measure in joules
Gravitational Potential Energy
=Mass x Gravity x height
Weight
=mass x gravity
Potential Energy
=mass x gravity x height
Change in Potential Energy
= weight x change in vertical height
Kinetic Energy=
1/2 x mass x velocity^2
What is the relationship between energy and work done?
Work done is energy. There is no difference.
What causes Acceleration?
unbalanced forces
Force
Mass x Acceleration
What is Voltage?
How is it measured?
the pressure that pushes electrons around a circuit.
It is measure in Volts (V)
What is current?
How is it measured?
The number of electrons flowing through a circuit being pushed by a certain voltage.
It is measured in Amps (A)
What is Resistance?
How is it measured?
a property that slows down the flow of electrons.
It is measured in Ohms (Ω)
Any device placed in a circuit is called a __________.
Every( answer to question) has a _________.
Load
resistance
What is Ohms Law?
The current in a circuit is proportional to the amount of voltage in the same circuit. The resistance will remain the same.
How can you measure Voltage?
Voltage=Current x Resistance
Voltage= Power/Current
What is Electrical Power?
How is it measured?
The amount of electric current flowing, due to an applied voltage.
It is the combination of voltage and current that results in the ability to do work.
Electrical Power is measured in Watts (W)
What is Electrical Energy?
How is it measured?
How can you calculate it?
The amount of current running through the circuit over a period of time.
It is measured in Watt-hours (Wh)
Electrical Energy= Power x Time
What is a variable resistor?
an object that allows you to change the current in a circuit.
How do you measure Charge?
What is it measured in?
Charge= Current x time
It is measured in Coulombs (C)
What is DC?
What is AC?
Direct Current
Alternating Current