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.
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.
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.
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.
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 seesaw is a lever that is balenced on a fulcrum
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.
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.
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.
The key difference between the three classes of levers is the relative positions of the effort, load, and fulcrum. In a first-class lever, the fulcrum is between the effort and load. In a second-class lever, the load is between the fulcrum and effort. In a third-class lever, the effort is between the fulcrum and load.
A wheelbarrow is a lever because the wheel acts as the fulcrum, the handles provide the effort force, and the load (materials being carried) is placed between the effort force and the fulcrum. When you push down on the handles, the wheelbarrow rotates around the wheel, making it easier to lift and move heavy loads.
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.
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.
You should place the fulcrum closer to the load you want to lift in order to get the most lifting power from a simple lever. This positioning creates a shorter effort arm and a longer load arm, which results in a mechanical advantage that makes it easier to lift heavier objects.
Because the load is always between the effort and the fulcrum, so the effort arm is always longer than the load arm.
Yes, using a lever and fulcrum can make lifting heavy objects easier by providing a mechanical advantage. By applying force at the right point on the lever, you can lift heavier loads with less effort than lifting directly.
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.
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.