Most people have very little understanding of how mechanical devices work. If asked how their Hydrovac does what it does, they will simply shrug. They don't need to know how it works, just how to operate it. However, the more you know about your mechanical devices the easier it will be for you to troubleshoot simple problems and create new uses for the devices you already own. This article will give you a basic grasp of how mechanical devices work so you can start your exploration and experimentation.

The first step to exploring the inner workings of any mechanical device is to understand the basic laws that all mechanical devices - indeed everything in the known world - must adhere to. Though they were originally written by physicists and scientists to describe the natural world, engineers use their understanding of these laws to create such devices as lumber strapping systems and computers.

Newton's first law of motion deals with inertia, which means that an object will keep moving in the same direction at the same speed unless a force acts upon it. This means that a Mississauga airport taxi will not move unless a force, such as a push or the force of a turning engine moving the wheels forward, is applied to it. It does not mean, however, that it will continue rolling forever with one push, because friction, or the force of the contact with the road, will tend to slow it down.

Newton's second law deals with how quickly you can get an object moving with your push. He discovered that the acceleration you can get out of a push depends not only on how hard you push but also how heavy the object is. Because there is a defined relationship between these factors, engineers can use a force gauge on their power source and the weight of an object to determine how fast an object or device will move when it is activated and make adjustments accordingly.

Newton's third law deals with how an object will move when a force acts upon it. That for every action, there is an equal and opposite reaction. Therefore if pavers attached a jet engine to their truck, the gas blowing out the back would move the truck forward. And since matter and energy cannot be created or destroyed, the energy needed to create these forces must be stolen from somewhere else, such as the explosive potential of oil.