Explain the functions of simple machines, which include multiplying force, multiplying speed and changing the direction of a force.
Recognize precautionary measures in using simple machines.
Explain how an aeroplane as a complex machine, can do work more easily and faster.
Simple machines (answers):
Levers, pulley, wheel and axle, inclined plane and gears.
Multiplying force means the force is multiplying and more strength and power. Multiplying speed means it would do it faster. Changing the direction of a force means there is multiple directions for the force.
You should not touch any simple machines if you do not know how to use them. Do not play with simple machines.
Aeroplanes have multiple parts and simple machines which can make it able to fly.