Key terms - simple machines

What is force?

• The force you apply to a machine 

• Push or pull

• Energy transferred by a force on an object 

What does a simple machine mean?

• The combination of simple machines

• They have few or no moving parts and they work by changing the direction of a force or the amount of force needed to do something.

• strength or energy made from a physical action

Mechanical advantage means

• The force you put on a machine

• The amount of help you get from using a machine to do  something instead of just doing it with your strength

• The force that the machine uses to do work

How many types of simple machines are there?

• 7

• 9

• 6

• 5

The purpose of machines is to make our lives easier

• True

• False

What is input force?

• The applied force you put on the machine

• The force that the machine uses to do the work

• Push or pull

What is a complex machine?

• The ability of an object to make a change

• When 2 or more simple machines are working together

• it's the same as simple machines

What is energy?

• The ability of an object to make a change

• push or pull

• using force to make a machine do something

Output force means

• The force the machine uses to move the object

• The force you use on the machine

• The energy we get from the sun

Where is the input force in this image?

• The guy pulling the rope down

• The rope and wheel pulling the weight up