science






 

Question by  Marcy30 (13)

What are some science fair ideas using a movable pulley?

This is for a 7th grader.

 
+7

Answer by  MzVickie (186)

Can you build a system that shows how a movable pully allows you to lift more mass than a fixed pully? Can you create a better bow an arrow using a movable pully system. Demonstrate a a movable pully can aid in a "Rube Goldfarb" to move objects upward or downward in a system

 
+6

Answer by  rubegoldberg (6)

Use a spring scale to compare the amount of force required to lift a standard object using a movable pulley compared to a fixed pulley and a compound pulley.

 
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