Science Test(s): Levers and Pulleys

Tuesday and Wednesday: Practical exam. Students will be asked to set up a particular pulley arrangement and a particular lever arrangement and respond to questions about those set ups. This will happen one-on-one.
Thursday: Written exam.
To do well on the test students need to know the following terms and what they mean:

• Load, fulcrum, effort, lever arm, force, mass, Class 1 lever, Class 2 lever, Class 3 lever, single-fixed pulley, single-moveable pulley, single-fixed/single-moveable pulley system (effort down), single-fixed/single-moveable pulley system (effort up), and Newtons.

To do well on the test students need to be able to:

• Read and explain a spring scale
• Explain the relationship of the number of load bearing ropes in a pulley system to the amount of effort.
• Explain the relationship of the distance a rope is pulled to the distance a load is lifted.
• Diagram levers.
• Explain what type of levers different objects are: hammers, nutcrackers, etc., etc.
• Analyze which pulley systems may or may not work.
• Give examples of different classes of levers.
• Understand the different types of advantages.