Mechanical advantage of a compound machine?
MA = Revolutions of input shaft / Revolutions of output shaft.
(Input torque * MA) * efficiency = Output torque
Note 100% efficiency = 1.0
The mechanical advantage of a compound machine is the multiple of the separate mechanical advantages of each simple machine. The efficiency of the compound machine is also the multiple of the separate efficiencies of each simple machine. So the work in to the first machine multiplied by all of the simple machine efficiencies gives you the work out of the last machine
Mechanical advantage is defined as the number of times that a machine increases an applied force for a given machine which would always decrease the mechanical advantage of that particular machine?
The ideal mechanical advantage (IMA), or theoretical mechanical advantage, is the mechanical advantage of a device with the assumption that its components do not flex, there is no friction, and there is no wear. It is calculated using the physical dimensions of the device and defines the maximum performance the device can achieve. The assumptions of an ideal machine are equivalent to the requirement that the machine does not store or dissipate energy; the power…
Mechanical Efficiency is the ratio of Actual mechanical advantage to ideal mechanical advantage.Efficiency will be maximum when Actual mechanical advantage equals that of ideal.But practically not possible.Actual mechanical advantage will be less due to friction,heat,deflection etc.avoiding these loses will increase the machine efficiency.
The mechanical advantage that a machine would have without friction or in another term is that you can find the IDEAL MECHANICAL ADVANTAGE (IMA) OF A MACHINE IS BY HAVING A MACHINE WITH NO FRICTION, ALSO BY MULTIPLYING YOUR EFFORT FORCE BY 2, HOWEVER BECAUSE OF FRICTION AND THE WEIGHT THE ACTUAL MA WILL BE LESS.
Why is the actual mechanical advantage of a machine different from a machine's deal mechanical advantage?
== Actual mechanical advantage is the number of times force exerted on a machine is multiplied by the machine. Ideal force is just a theory. The formula for mechanical advantage is mechanical advantage== out put force divided by input force.The formula for efficiency is efficiency=output work divided by input work times 100%. Output force is the force exerted on the machine. Input force is the force you exert on the machine. ===