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Levers have a greater mechanical efficiency that other simple machines because?
Wiki User
∙ 11y ago
They have to overcome less friction
Wiki User
∙ 11y ago
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Why do levers have a greater mechanical efficiency than other simple machines do?
You can move a large load using a relatively small effort. http://www.deyes.sefton.sch.uk/technology/AS&Alevel/mechanical_systems.htm
What is the trade off of effort in using simple machines?
The simple machines - a lever for example - are usually designed so that you need less force. In compensation, you need to move the lever for a greater distance. This follows directly from the law of conservation of energy.
What simple machines were used to build the great wall of china?
Simple Machines allowed the builders of the Great Wall of China to build more quickly and efficiently. Machines such as levers and inclined planes allowed the amount of energy spent to do the work to be decreased. Other machines such as pulleys allowed objects to be transported up and down the wall with greater ease. Wedges were incorporated in the hammers that the Chinese used to pound the earth and all the materials of the Wall together.
What do all simple machines have in common?
A simple machine uses a single applied force to do work against a single load force. Ignoring friction losses, the work done on the load is equal to the work done by the applied force. The machine can increase the amount of the output force, at the cost of a proportional decrease in the distance moved by the load.
What are the disadvantages of simple machines?
Simple machines usually make work easier by lengthening the distance the object being moved travels. If you want to raise a box up 5 ft by using a pulley, you will actually have to move 10 ft of rope, if it is a single pulley. Likewise, if you use a ramp, you have to move it an overall greater distance along the incline just to get it to the same height.
Why do levers have a greater mechanical efficiency than simple machines?
The transmission lever is very simple and there is no friction.
The efficiency of the wedge is low because of?
friction or The mechanical advantage is greater for thinner wedges. However, the efficiency is low because of the large amount of friction.
Is a ideal machine has an efficiency of less than one equal to one greater than one?
ideal machines have mechanical efficeincy equal to 1 (100% efficient) since efficiency is the ratio of the power output to the power input
Why can't a pulley have a mechanical advantage greater than 1?
The mechanical advantage of a pulley can be greater than 1.The efficiency cannot but that is a different matter.
Why do levers have a greater mechanical efficiency than other simple machines do?
You can move a large load using a relatively small effort. http://www.deyes.sefton.sch.uk/technology/AS&Alevel/mechanical_systems.htm
How can machines be changed?
People are developing new machines all the time. Sometimes they do things that earlier machines could not do, or they may do the same things but with greater efficiency, greater speed, less cost, and so forth. We always try to make our machines better.
The efficiency of gas exchange in the lungs of vertebrates is greater because of what?
The efficiency of gas exchange in the lungs of vertebrates is greater because it increases the lungs' internal surface area.
What is the relationship between ideal mechanical advantage and velocity ratio?
The ratio of Mechanical Advantage and Velocity Ratio is Efficiency. That is to say the ratio of M.A. and V.R. is constant.
Is energy input is greater than enrergy out put?
In machines, this is always the case, since the machine won't work at 100% efficiency.
Why do machines the less force to do the same amount of work?
Because machines allow force to be applied over a greater distance.
What is a coumpound machine?
A compound machine consists of two or more simple machines put together. In fact, most machines are compound machines. Compound machines can do more difficult jobs than simple machines alone. Their mechanical advantage is far greater, too. Some examples are a pair of scissors and a bicycle.
Why can't the efficiency of a device or a process be greater than 100?
Efficiency cannot be greater than 100% because efficiency measures energy, and since energy is not made, only transfered (conservation of energy) then we cannot gain energy. Hence the energy out must be at most the energy in. Thus efficiency can be at most 100%
