End-of Module Assessment for
Levers and Pulleys
Study Guide
* Study vocabulary in journal
The pivot point in a lever system is called a fulcrum.
The unit used to measure force is called a Newton.
A baseball bat is one type of lever system. In its regular use, it is both a
class-I and a c1ass-3lever.
In a class-2Iever, this is a correct statement. Equal to or less than the
weight of the load.
These pairs of levers belong to the same class, a pair of scissors and a
crowbar.
It depends on how the lever is used to determine how much effort is
needed to lift a l-kg mass.
You should pull the rope 30m to lift a load of 10m using a pulley system.
* Know about a spring scale
-Be able to draw in a measurement
-Know what a dark line and long line represent
-Know what the lighter and smaller lines represent
*Be able to draw a class-I lever lifting the earth
*Be able to label the load, effort, and fulcrum on a nutcracker.
*Be able to understand a graph that shows effort required to lift the
load and distance of effort from the fulcrum.
-2.2 Newton's is needed to lift a load when the effort is 25 ern from
the fulcrum.
-3.8 Newton's is needed to lift a load when the effort is 13 em from
the fulcrum.
-The effort would be 20cm from the fulcrum is it takes 2.7 Newton's
of effort to lift the load.
-The greater the distance from the fulcrum, the easier it is to lift the
load.
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*To determine how much effort is required to lift a load, divide by the
number of ropes lifting the load.
*The three types of lever systems are alike because: they each have a
fulcrum, load, and effort
*The three types of lever
-Class-I lever-the
-Class-Z lever-the
-Class-3 lever-the
systems differ because:
fulcrum is between the load and effort
load is between the effort and fulcrum
effort is between the fulcrum and the load
*Be able to give 2 examples of each lever.
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*Be able to explain how to load a 50-kg boulder into a truck using a
lever. A lever is not very practical.
*Be able to explain how to load a 50-kg boulder into a truck using a
pulley.