Complex Machines:
Complex machines combination of two or more Simple Machines, they are also known as Compound Machines. Some of the examples of Complex Machines are:
- Bicycle
- Lawn Mower
- Wheel Barrow
- Screw Jack
- Shopping Trolley
Few Examples of Complex Machines
Hand Cart: A combination of two Wheels mounted on an Axle mounted on a platform. A hand cart enables you to carry heavy loads even if you are alone thus making your work easy. This type of Carts are now a days used to carry materials to short distances only.
Bullock Cart: These are similar to the Hand Cart but they can be pulled using two oxen or buffaloes. These are getting extinct due to the advent of engine driven Trolleys etc. You may still be able to see them in operation in developing countries e.g. India, Pakistan, China etc. it is a real fun to watch such simplistic mechanisms in action.
Lawn Mower: These are more complex than the Hand Cart or the Bullock-Cart. The mechanism of motion is same as that of a hand cart but it has a rotating drum with blades, attached to the wheel with a Chain & Sprocket arrangement, which enables us to mow the lawn by pushing the Lawn Mover. The Blade-Drum rotates as the Lawn-Mover moves thereby cutting the grass.
Screw Jack: This is the simple Screw & Nut arrangement mounted on a housing. The Nut is rotated with moves the Screw up. This linear movement of the Screw is utilized fof lifting very heavy loads.
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