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lever
A screwdriver.
Steel is used to form both hammer and nails.
A hammer is a lever because when you want to remove a nail it helps to pry it out of the place.
A nail is a simple machine. :DDD i learned that in tech today.
A claw hammer
Lever
a hammer
lever
The effort force is where you are holding the hammer to pull the nail.
hammering a nail is a physical change, this is because the nail changes shape from being long to being short and in a board for example.
the claw
You are using a lever when you pull a nail with a hammer or bar.
A claw hammer is a lever when it is being used to pull a nail out.
The hammer exerts a force on the nail; the nail exerts a force on the hammer.
impact force example
becasue the force of the hammer is being doubled, the nail will be droven in twice as far