Study Guide

8
The ow of electric current
Attach the wheels and set the propeller spinning!
The ow of electric current
What you need
Wheels (3)
Axles (2)
Wheel with attached pulley (1)
Propeller clasp (1)
Experiment and observe!
Think about it!
Put the axles
through the car
body and attach
the wheels.
Don't forget the
propeller clasp.
Tilt the propeller.
Turn it on
and let it run!
Be careful not to poke your hand with the axle stick.
Keep the propeller away from your hands and face while it is spinning.
Which way is the car
moving?
What do you think will happen
if we reverse the plugs?
Observe it carefully and
check the answer.
Observe it carefully and
check the answer.
Forward
Backward
Forward
Backward
Forward
Backward
Spinning
clockwise
Spinning
counterclockwise
The way the plugs are
connected will change
the way the propeller
spins and the way the
car moves.
Electricity has a current
and connecting the plug
the opposite way
reverses the electric
current, which causes
the motor to spin in the
opposite direction.
Electricity ows from the
+ terminal to the
– terminal.