What are some science fair ideas using a movable pulley?

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

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.