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pendulum structure of newtons cradle balance balls
The newtons cradle balance balls have undergone several renovations over the years. However, the basic outline remains the same and is very simple. An odd number of balls (usually five or seven) that barely touch each other are suspended from a wooden or metal frame. Balls are usually made of stainless steel and, in rare cases, titanium. Due to its good elasticity and low price, stainless steel is ideal for constructing balls.
newtons cradle balance balls each ball has the same characteristics (size, weight, mass and density) and is suspended using two lines of equal length. The wires slope from either side of the frame to form an inverted bottomless triangle with the balls. They also help limit the movement of the pendulum to a single plane parallel to the frame bars.