Question | Answer |
Lever | a simple machine that people use to gain a mechanical advantage, such as making work easier. |
lever arm | a stick or beam free to pivot at a point |
fulcrum | the point where the lever arm pivots |
load | the mass lifted or the resistance overcome by a lever |
effort | the force needed to move a load or overcome a resistance |
Effort is measured in __________. | Newtons (N) |
In what ways can a lever provide an advantage?
A lever can make a load _________ to lift, it can move loads ,and it ________ the effort. | easier, reduces |
What is the relationship between the load and effort that gives a lever user the greater advantage?
In a lever system the farther from the ________ the effort is applied, the ______ the advantage is to the lever user. | fulcrum,easier |
Two-coordinate graphs | show relationships between two variables and can be used to make predictions |
Advantage | is a benefit obtained by using a lever (or other simple machine.) |
When the load is at a constant position on the lever arm, how can you make it easier to lift the load? | The farther the effort is from the fulcrum, the easier it is to lift the load. |
What is the difference between the weight of the load and the amount of effort needed to lift it? | The weight of the load remains the same , but the effort needed to lift it varies depending on where the effort is applied on the lever arm. |
When using the spring scale to measure effort needed with the lever, you must add ________ to your reading,because the _________ of the spring scale is already exerting 0.5 newtons on the lever. | 0.5N, weight: |
What is the relationship between the location of the load on the lever system and the effort it takes to move it? | The effort needed to lift the load decreases as the load gets closer to the fulcrum; the effort increases as the load gets farther from the fulcrum. |