The best way to make a clock is to begin by purchasing a clock kit, which usually contains a battery-operated movement, a bar that controls the hands, and the clock hands themselves. There are many materials suitable for... More » Science Physics Motion & Mechanics

Traditional alarm clocks use an oscillating wheel with two separate springs attached to the gear train; one spring drives the time-counting mechanism, while a second spring activates the alarm after a certain number of t... More » Home & Garden Appliances

To reset clock chimes, the owner must first use a level to make sure the clock is level. If the clock isn't level, the pendulum can't work. Move the minute hand clockwise to the next quarter hour, and pause to let the ch... More »

There are many different kinds of clocks, and they all work differently based on which mechanism they use. All clocks have a source of power, a time base that keeps time, a way to keep track of different amounts of time ... More »

A lever is a simple machine that is made up of a board or bar that rests on an object. Levers are used to achieve a mechanical advantage, such as making lifting heavy objects easier. More » Science Physics Motion & Mechanics

A lever, by definition, is a rigid bar that rotates around a fixed point. The fixed point is called a fulcrum. A lever is a simple machine, and its function is to use a force, called effort, to move a weight, called a lo... More »

Without friction, the best way to move would be with rocket propulsion. If there are solid objects on this frictionless surface, it would also be possible to move by pushing off of them. More »