1
2
3
100
1) When an object is in motion, it possesses what type of energy?
Kinetic
100
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200
Battery → Bulb:
what is the energy transformation?
chemical → electrical → light
200
The transfer of thermal energy always travels from...
Warm to cool
200
At which point are the ball's kinetic and potential energies approximately the same? 
T
300
All of the following simple machines can be seen in the picture except which?
Wedge
300
Which class of lever is the diagram below?
3
300
The role of simple machines can best be describe as
Spreading the work out over a longer distance to decrease the force needed
400
Which best describes mechanical energy?
the sum of an object’s potential and kinetic energy
400
What is the pulley in the diagram doing? 
It is changing the direction of force.
400
Which kind of energy is most likely transferred when one object is pulled across the surface of another object?
Thermal
500
Which best explains how a simple machine affects the movement of heavy objects?
It decreases the amount of force needed to move the object by increasing the distance for movement.
500
The efficiency of a simple machine is...
Always less than 100%
500
What conclusion can be made based on the graph? 
Kinetic and potential energy change, but total energy stays the same.