In physics, circular motion is a movement of an object along the circumference of a circle or rotation along a circular path. It can be uniform, with constant angular rate of rotation and constant speed, or non-uniform with a changing rate of rotation. The rotation around a fixed axis of a three-dimensional body involves circular motion of its parts. The equations of motion describe the movement of the center of mass of a body.
on futuristic putters: Although there is a standard length for conventional putters (men's are 35 inches - 90cm, and women's are 33-34 inches - 84-86cm), don't be afraid of altering the length of your putter if you feel uncomfortable with it. Some putters are light and others are heavier.
The most commonly used putter counterweights are the 60g, 80g and 100g weights, with the 80g and 100g counterweights being the most commonly used by most golfers for the putter. There is no question the chance of improved putting performance with a heavy counter weight in the putter is very high. From speaking with clubmakers who offer this fitting service to their golfers and from our own work with golfers, we estimate the putting improvement rate for counter weights to be over 80%.