What is Mechanical advantage: Definition and 67 Discussions
Mechanical advantage is a measure of the force amplification achieved by using a tool, mechanical device or machine system. The device trades off input forces against movement to obtain a desired amplification in the output force. The model for this is the law of the lever. Machine components designed to manage forces and movement in this way are called mechanisms.
An ideal mechanism transmits power without adding to or subtracting from it. This means the ideal mechanism does not include a power source, is frictionless, and is constructed from rigid bodies that do not deflect or wear. The performance of a real system relative to this ideal is expressed in terms of efficiency factors that take into account departures from the ideal.
Hello,
I'm trying to come up with a method for calculating the mechanical advantage of a vehicle's suspension (i.e. how much does the spring compress if I move the wheel center by some infinitesimally small amount?). I have a method that I thought was correct, but I recently compared my...
1. A pair of brothers have a 20kg, 3.5m plank they want to use as a lever. They use a fulcrum which is 0.75m from the load mass. If they push down one end of the lever with a force of 210N, then they can move the Load mass away. What is the upward force exerted on the large mass? If the...
Don't "mechanical advantage" disagree with the law of nature ?
hello
I just can't swallow the idea of mechanical advantage.
* if you have a 10 KG mass , you need , say , 100 N to left it up
* if your friend helps you , each one of you will exert only 50 N
* but if you are alone , and...
I have a simple lever with two points of equal force, each at a different distance from the fulcrum.
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What I want: As the arm turns, one point of force moves at a faster rate than the other.
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What I DO NOT want: One point of force having a mechanical advantage over the other...
the formula for the IMA for an inclined plane is 1/sin(theta)...right? But what if the angle was zero (which would mean it is not an inclined plane), then you wouldn't be able to divide by zero...so how would you get the IMA if the angle was zero?
I am very very confused about this...any help...
Homework Statement
Stan raises a 1200 N piano a distance of 5.00 m with pulleys and pulls on 20 m of rope. What is input work and mechanical advantage? Homework Equations
Wo=Wi
MA=Fr/FeThe Attempt at a Solution
I calculated output work as 1200N*5.00m=6.00*10^3 and my book says Wo=Wi; but the...
For a pulley, when is it that the mechanical advantage is greater than 1 and when is it that it is equal to 1? If a rope was hung over a pulley with unequal weights applied to both ends, the larger weight (77kg) would pull the lesser weight (30kg) upward, and so what would the mechanical...
Mechanical Advantage : Please Help!
hello
if there was a pulley, mechanical advantage of 2, and the force of the weights dangling below the pulley was 20N.
to find the 'upward' force, or force of the pulley
would it be 20N multiply by 2, due to mechanical advantage, making it 40N
or...
The hammer is an example of a machine when you take a nail out of a piece of wood. is a lever type 2.
professionally, how would you describe why the hammer has a long handle, and how that would result in a greater ideal mechanical advantage? please include the forumla of IMA = dl/de and use...
How do you calculate the mechanical advantage of a 3 gear train system.
The formula I have for gears is only for 2 gears:
MA = number of teeth in the driving gear/number of teeth in the other gear.
Question: http://img486.imageshack.us/img486/5593/pulley9dm.jpg
Ok so i understand that for every moveable pulleys you multiply the mechanical advantage by 2. In this scenario there are 3 moveable pulleys, and they all look like they are supported by the ceiling so I need to divide the load...
An effort of 3000kg is required to move a mass of 2000kg in a certain simple machine. If the mass is raised 1.5m while the effort moves 12m, find the actual mechanical advantage.
A man uses 65 N to lift a box off the ground with a lever. The effort arm is 60 cm. The resistance arm is 10 cm. What is the Ideal Mechanical Advantage?
Levers Please Help!
A man uses 65 N to lift a box off the ground with a lever. The effort arm is 60 cm. The resistance arm is 10 cm. What is the Ideal Mechanical Advantage?
I have a catapult that is a class 1 lever i.e. a rubber band pulls down on the beem on one side of the fulcrum; the load is launched from the end of the beem on the other side of the fulcrum.
I want to increase the throwing distance of the catapult. I recognize that one option is to increase...