Tamara's practice test on levers

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WELCOME TO MY PRACTICE TEST ON LEVERS
1) what is a lever?



2) What is a 1st class lever? name 2 examples of a first class lever.




3) What is a 2nd class lever? Name 2 examples of a 2nd class lever.




4) What is a 3rd class lever? Name 2 examples of a 3rd class lever.


5) Explain why a 3rd class lever always gives a mechanical advantage that is less than one