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Machines Machines are a way to change the force of an action There are two types of machines which are simple and complex Simple machines are devices that change the force used to do work A complex machine is a device made of two or more simple machines There are three ways that machines can help reduce effort One in which would be a machine can change the size of the force An example of this would be a car jack Another way that machines reduce effort is by changing the direction of the force An example of this would be kids on a seesaw when one kid pushes up the other kid goes down The last way it can change the speed with which the force is applied An example of this is a blender because the blades move a lot faster then when you turned the blender on There are six different types of simple machines One type is an inclined plane Two examples of this type of machine are ladders and wheel chair ramps These are both good examples because even thought it takes a little longer for the work to get done it is easier the going straight up The second type of a simple machine is levers There are three types of levers They are first second and third class levers Two examples of levers would be a crowbar and a wheelbarrow The third type of simple machine would be pulleys Two examples of this would be a block and tackle and a pulley on a tree house to get things from off the ground The fourth type of simple machine is the wheel and axle Two examples of this would be a steering wheel and a
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