Cutting the grass is something that is often boring and uncomfortable, but must be done. Luckily we don't have to do this with scissors and knives; we have complex machinery to do it for us. Even with machinery though, mowing the lawn still takes quite a while. So why not make that time entertaining by thinking about the scientific aspects of how they work on the inside?
All mowers operate on the same principle: hit the blades of grass with sharp blades at a high velocity. Different kinds of lawn mowers do this in different ways.
Lawn Mower
Because push mowers are the most cheap lawn mowers there are, they are also the simplest. The basic structure consists of a cylinder that encloses multiple rotary blades. The cylinder has wheels on its outer edges. These mowers are powered by human muscle, so they use no additional energy input. When the user pushers the mower, force is transferred down the connecting shaft and turns the wheels, which in turn move the blades in a circle. Push mowers make the cleanest cuts.
With other kinds of mowers, the blades are switched from moving in a circular rolling motion across the grass to moving in a horizontal circle while the mower is pushed across the yard. These mowers have gears that transfer force into turning the wheels. These are powered either by electrical current from the nearby house or by burning gasoline in an internal combustion engine. Electric mowers are the more efficient of the two. types, whereas burning gasoline generates more heat.
There is also a new variety of mowers: the robotic mowers. These advanced gadgets run on rechargeable batteries and require no supervision. One simply sets up a wire around the square area to be mowed and sets the root loose. One bot can successfully mow up to 5 acres of lawn!
With that out of the way You can finally get to that overgrown grass. Hopefully you'll have enough random facts about lawn mowers to keep your mind occupied during those long hot summer mowing days!