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7Efficiency of a machine is always less than 100%.
Mechanical advantage (MA) is the ratio of load to effort.
Velocity ratio (VR) is always equal to mechanical advantage.
A machine with 100% efficiency is called an ideal machine.
Friction causes mechanical advantage to be less than velocity ratio.
Effort distance is the distance moved by the load.
If a lever has MA = 4 and VR = 5, its efficiency is 80%.
Input work is always equal to output work in real machines.
Percentage: 0%
Which of the following given statements is true?
Efficiency of a machine is the ratio of:
Mechanical Advantage is calculated by:
Velocity Ratio (VR) formula is:
A machine is called ideal when its efficiency is:
Friction in a machine affects:
Output work of a machine is calculated by:
If MA < VR, then efficiency is:
Efficiency can also be written as:
If a machine lifts a load with 0 friction, its efficiency is:
Work done by effort in a machine is called ______ work.
Work done by a machine on the load is called ______ work.
A machine with 100% efficiency is called ______ machine.
Due to ______, MA is always less than VR.
Efficiency is always less than ______%.
Efficiency is the ratio of ______ work to input work.
The ratio of output work to input work expressed in percentage is called ______.