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Consider a wheelbarrow:
When the weight is closer to the wheel, there is less load on the lever or handle.
M = F*d
Moment = Force x distance
In this case, force is the mass of the object in the wheel barrow, and distance is distance from fulcrum. So, the smaller the distance, the lower the "moment" or lifting effort.
When the distance = the length of the lever, you are basically lifting the entire force.
What else can I help you with?
What is the fulcrum called at the end with the load in the middle?
The fulcrum can only ever be called the fulcrum. You may be asking about the three classes of levers: if so, you need to ask the question with enough description to allow an answer.
How does the position of the fulcrum and the location of the load affect the amount of effort force you must exert to lift the load?
To do this you first have to calculate your ideal mechanical advantage (IMA). The IMA is equal to the effort distance (the distance from the fulcrum to where you will apply the effort) divided by the load distance (the distance from the fulcrum to the load). You can then set your IMA equal to your acutal mechanical advatage (AMA) which assumes 100% efficiency. The AMA is equal to the load force (the weight of what you are lifting) divided by the effort force (the # you are looking for). So, for example, if your IMA is 5 and your load force is 500 lbs: 5=500/effort force. Therefore the effort force would be 100 pounds.
What class of lever is a shovel?
Generally, the point of the shovel handle is not so much as a machine to amplify the force you exert, as it is simply a way of being able to reach the ground with a scooping device, without having to bend your spine too much in order to do it. There are times, however, such as when you use a shovel to dislodge a large rock, when you could use it as a lever.
What are the 3 classes of levers?
Levers are classified into three types (first-class, second-class, and third-class) depending on the relative position of the fulcrum (pivot point), the point of applied (input) force, and the location of the load (output force). In a first-class lever, the fulcrum is between the input force and the output force, and the load is moved in the opposite direction of the applied force. Placing the fulcrum closer to the load gives an advantage of force (less force needed to move the load a shorter distance), while a fulcrum closer to the point of applied force gives an advantage of distance (the load is moved a greater distance but more applied force is needed). First-class levers include a crowbar, using a hammer's claw end to remove a nail, and a pair of scissors. In a second-class lever, the load is between the fulcrum and the point of applied force, so both forces move in the same direction. Less force is needed to move the load, but the load does not move as far as the direction over which the input force must be applied. Examples include the wheelbarrow, a bottle opener, and a door on its hinges. In a third-class lever, the input force is applied between the fulcrum and the load, and both move in the same direction. The amount of applied force is always greater than the output force of the load, but the load is moved a greater distance than that over which the input force is applied. Examples include a hammer driving a nail and the forearm of a person swinging a baseball bat. If you want to find out any more, go to: http://www.technologystudent.com/forcmom/lever1.htm :) :) :) :) :) :) :) :) :) :) :) :) :) :) :) :) :) :) :) :) :) :) :) :) :) :) :) :) :) :) :) :) :) :) :) :) :) :) :)
A see-saw is an example of what type of simple machine?
a seesaw is a lever that is balenced on a fulcrum
What is the fulcrum in a pair of pliers?
In a pair of pliers, the fulcrum is the pivot point where the two handles meet. This allows the user to apply force on one end of the tool while the jaws exert a different force on the other end. The position and design of the fulcrum determine the mechanical advantage of the pliers.
What are some examples of class 3 levers?
First class levers are like see-saws. The fulcrum (turning point) comes between the effort and the load. So if you push down on the effort the load goes up. With second class levers the load comes between the effort and the fulcrum. This is good for catapulting things. Third class levers have the effort between the load and the fulcrum. An example would be a fishing rod. The fish on the end is the load, your hand on the rod is the effort and the hand at the end is the fulcrum.
What is the fulcrum called at the end with the load in the middle?
The fulcrum can only ever be called the fulcrum. You may be asking about the three classes of levers: if so, you need to ask the question with enough description to allow an answer.
What makes the first class lever second class lever third class lever different?
1st order levers have the fulcrum between the load and effort arms. The mechanical advantage of these levers can be greater or less than 1, depending on the length of the arms.2nd order levers have the load portion between the effort portion and the fulcrum. These always have a mechanical advantage greater than 1. They increase the force exerted at the expense of distance.3rd order levers have the effort portion between the load portion and the fulcrum. These always have a mechanical advantage less than 1. They decrease the force exerted with a gain to the distance.
How is a wheelbarrow a lever?
There are 3 things in a lever. They are load,fulcrum, effort. The place where the wheel is the fulcrum, the place where we put something is load,the place we hoist the wheelbarrow is the effort so it is a second class lever.
How does the position of the fulcrum and the location of the load affect the amount of effort force you must exert to lift the load?
To do this you first have to calculate your ideal mechanical advantage (IMA). The IMA is equal to the effort distance (the distance from the fulcrum to where you will apply the effort) divided by the load distance (the distance from the fulcrum to the load). You can then set your IMA equal to your acutal mechanical advatage (AMA) which assumes 100% efficiency. The AMA is equal to the load force (the weight of what you are lifting) divided by the effort force (the # you are looking for). So, for example, if your IMA is 5 and your load force is 500 lbs: 5=500/effort force. Therefore the effort force would be 100 pounds.
How can a lever be balanced?
A lever can be balanced by adjusting the position of the load and the effort force so that they are equal distances from the fulcrum, or pivot point. This ensures that the moments on either side of the fulcrum are equal, resulting in a balanced lever.
Where do you place the fulcrum to get the most lifting power from a simple lever?
A lever's mechanical advantage is the ratio of the effort arm to the load arm. The shorter the load arm, the greater the lifting power, so the closer the fulcrum is to the object being lifted, the better.
Why is the mechanical advantage of second class levers is always greater than 1?
Because the load is always between the effort and the fulcrum, so the effort arm is always longer than the load arm.
Would it be easier to use a lever and fulcrum?
Depends on the job at hand. The most common use is to multiply force so you can move something that weighs more than you can lift on your own. In doing this you give up distance. Place the lever and fulcrum so that the fulcrum is close to the 'load'. When you push on the long end of the lever it moves a long distance with a small effort, The load will be lifted a shorter distance.
How would you set up a lever so that it has a mechanical advantage greater than 1?
You can set up a lever system by increasing the distance between the applied force and the fulcrum compared to the distance between the fulcrum and the load. This configuration helps to amplify the force applied. The longer the distance between the force and the fulcrum, the greater the mechanical advantage.
What class of lever is a shovel?
Generally, the point of the shovel handle is not so much as a machine to amplify the force you exert, as it is simply a way of being able to reach the ground with a scooping device, without having to bend your spine too much in order to do it. There are times, however, such as when you use a shovel to dislodge a large rock, when you could use it as a lever.
