LAWNMOWER
The shape of a Lawnmover - whether driven by electrical, petrol or human power - shave grass close to the ground. The Petrol-powered type shown here has a small engine that is electrically ignited by a battery and spark plug.
This engine rotates a horizontal blade at the base of the lawnmower that slices the grass against a fixed blade.
A grass bag at the back of the machine collects the cuttings. As the engine rotates the blades, it also turns the rear wheels, moving the lawnmower forwards.
Gears ensure that the horizontal blade spins faster than the wheels so that all of the grass is cut neatly befor the lawnmower moves on.
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