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grade 3/4

Quiz yourself by thinking what should be in each of the black spaces below before clicking on it to display the answer.
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Question
Answer
What is effort?   show
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What is force?   show
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What is a spring scale used for?   show
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What kind of pulley is attached to a structure?   show
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show You are lifting the whole weight of the load  
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show The load is attached to the pulley  
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show You have to pull up to lift the load  
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show Combined pulley  
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show You count the number of supporting ropes  
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What two pulley systems cut the weight of the load in half?   show
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If the gear you turn goes clockwise, what direction does the second gear go?   show
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What direction does the effort force go in a fixed pulley?   show
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What direction does the third gear in a gear train go if the first gear turns clockwise?   show
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If the gear you are turning is large, and the second gear is small, which gear turn faster?   show
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If the large gear has 20 teeth, and the small gear has 10 teeth, how many times will the small gear turn when the large gear turns once?   show
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show The large first gear  
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show Spur gears  
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show Bevel gears  
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Created by: libraryb
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