How do I study for my 1st quiz?

Science Quiz - moved to Friday

How do I study?

*Draw pictures of the 3 types of levers and label where the fulcrum, effort and load are.  

*Draw examples from the sheet we did in class with different objects.   Label the fulcrum, effort and load, and say whether or not it's a 1st, 2nd or 3rd class lever.  Check your answer with the sheet we did.

*Memorize - 1st class lever, the fulcrum is ALWAYS in the middle.
                    -2nd class lever, the load is in the middle.
                    -3rd class lever, the effort is in the middle.
 

SCISSORS - the fulcrum is the screw in the MIDDLE... load is what it is cutting, and the effort coming from the hands closing the handles.  ---- 1st class lever

 FISHING ROD - Fulcrum in the handle end of the rod... the effort in the middle of the rod and the load on the end where the fish is caught. ------------- 3rd class lever.

NUT CRACKER - Fulcrum is at this left hand end where the screw is.  The load is the nut in the middle and the effort on the end with the handles.   ----------------- 2nd class lever.


A lever is an arm which tilts around the fulcrum ( a pivot) to provide useful motion.   Levers make work easier because they amplify force, or change the direction of the force or magnify the distance an object is moved.  A lever is a simple machine that makes work easier.  It can aid in moving, lifting, etc.