How Efficient?
Part two
Kinetic energy of turning the axle on a motor can be used to generate electricity to light a lamp or even turn another motor.
Students are to plan an experiment to determine how efficient the generator is at turning another motor.
Generating electricity to change to kinetic energy to move a motor
looses some energy to friction and heat.
Find the efficiency as percent of turns on the dynamo.
The LEGO motors with fly wheels and gearing inside seem to be more than 90% efficient.
