a lever
catapult
a compound machine is a combination of simple machines
lever
It is a lever
A compound machine is made up of two or more simple machines. Most of the machines we see today are compound machines, some examples are: zippers, can openers, bicycles, staplers, scissors, pencil sharpeners, ceiling fans, pizza cutters, wheelbarrows, and bulldozers.
# lever* # plane* # screw # wedg *=in phone
A fulcrum
A seesaw is a lever balanced on a fulcrum.
a compound machine is a combination of simple machines
Suppose you nedded to move an object. You might use tools to help you. Machines are tools that use enegry to do work. Simple Machines are machines with a few or no moving parts. Machines make work easier. You probably have used several of the six different kinds of simple machines.Pretend you need to lift a heavy object like a big rock. You could use a lever to help you. A lever is a simple machine machine of a board that is used to move objects. A seesaw or teeter-totter is really a lever. The middle of the seesaw has something under it to hold it up. This is called the fulcrum. The lever moves back and forth on the fulcrum. On a seesaw, each person takes turns lifting the other person.To lift a rock with a lever, you would need a board to be the lever and a fulcrum to hold it up. Another rock can be a fulcrum. The object being lifted is called the load. You move the load by pushing down on the end of the lever.
pulley
A lever
what kind of simple machine involves the rake
force
it is a lever
It is a wedge.
lever
It is a lever