Theoretically, if the mechanical advantage, velocity ratio of a simple machine are equal in magnitude what will be its efficiency ?
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Velocity ratio of simple machine is the ratio of distance travelled by effort to the distance travelled by load in the machine. ... For ideal or perfect machine, work output is equal to the work input but in practice, the work output of a machine is always less than work input due to the effect of friction.
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As velocity ratio or ideal mechanical advantage is a simple ratio of two distances, it also does not have the unit. The friction is not involved in it. ... If the frictional force in the machine increases the efficiency decreases because machines are frictionless in practice, the efficiency of a machine can never be 100%.
As velocity ratio or ideal mechanical advantage is a simple ratio of two distances, it also does not have the unit. The friction is not involved in it. ... If the frictional force in the machine increases the efficiency decreases because machines are frictionless in practice, the efficiency of a machine can never be 100%.
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