Air hockey tables have very little friction. Air is pumped through tiny holes, preventing the puck from touching the table. Game on!
Force and Motion: A pattern of motion is the repeated processes of an object moving.
Motion can be straight (like an arrow being shot at a target), circular (like a merry-go-round), up and down (like a pogo stick), zig-zag (like skiing), side-to-side (like dancing).
Some motion is a combination, like a swing. When you are swinging you are moving up and down, as well as forward and back. When the same motion repeats over and over, it creates a pattern.
A pendulum is a weight on a string that hangs from a single point. Pendulums swing to create a pattern of motion. The length of the string affects the pattern it creates. For example, short strings swing fast. Pendulums will continue to swing in the same pattern until a force, such as friction, stops them.