Conservation of Energy
Work and Power
Resistance
Simple Circuits
Pendulum
100
What is conservation of energy?
Energy changes form, but the total energy stays constant.
100
What are the two equations for work?
W = Fd
W = change in KE
100
When you add a resistor to a parallel circuit, the total resistance ___________.
decreases
100
A circle with an X in it represents which circuit element?
A bulb or a light.
100
At which points is the velocity equal to zero?
blue and red
200
If all energy is conserved, what happens to the total energy of the system?
It stays the same
200
What is the equation for power?
P = W/t
200
Draw a circuit with 2 resistors in series and 3 in parallel. Hint: There should be 4 resistors total.
See drawings.
200
What does this symbol mean on a multimeter?
continuity
200
At what point is the mechanical energy at a maximum?
Trick question, it is all the same at each point.
300
What is the equation for mechanical energy?
ME = GPE + KE
300
What is the unit for power?
Watt (W)
300
If three 4 Ohm resistors are in parallel, what is the total resistance of the circuit?
1.33 Ohm
300
A load on a circuit is.....
any component that consumes or converts electricity
300
At the orange point, what is the equation for mechanical energy?
ME = GPE + KE
400
As a roller coaster goes up a hill the ___________ decreases and the _____________ increases.
KE; GPE
400
A machine does 300J of work in 5 seconds, what is its power?
250W
400
In a parallel circuit, ___________ is the same for all elements. In a series circuit, ____________ is the same for all elements.
voltage, current
400
What is Ohm's law?
V = IR
400
At what point is the kinetic energy at a maximum?
yellow
500
A roller coaster sits at the top of tall drop and then goes through a loop de loop to be level with the ground. At which point on the track is there the most energy in the system?
It is the same at all points.
500
A force of 5N is applied for a distance of 10m over a period of 20 seconds. What is the power?
W = Fd -> W = 5N * 10m = 50J
P = W/t -> 50J / 20s = 2.5W
500
If all three resistors in this circuit are 10 Ohms, what is the total resistance?
6.67 Ohms
500
What is the resistance of this resistor?
120 Ohms +- 5%
500
Where is GPE equal to zero?
yellow