Mada za sehemu hiiMachines And WorkMada 7
- Pulley systems
- Mechanical advantage, velocity ratio, and efficiency of simple pulleys
- Mechanical advantage, velocity ratio and efficiency of a fixed pulley
- Mechanical advantage, velocity ratio and efficiency of a movable pulley
- Pulley systems
- Complex machines
- Work
Mechanical advantage (MA)
Mechanical advantage is the ratio of the weight of a load to the effort used to lift or move the load. A high mechanical advantage indicates that a small effort is used to lift or move a large load. This value also shows how much the machine has simplified the work.
Units: Mechanical advantage has no units, since the unit of load is the same as the unit of effort.
Formula:
Velocity ratio (VR)
Velocity ratio is the ratio of the distance moved by the effort to the distance moved by the load when doing work with pulleys.
Formula:
Efficiency
Efficiency of a machine is a measure of its ability to perform work with minimal effort or energy and in the shortest possible time. It is expressed as a percentage, calculated by dividing the mechanical advantage by the velocity ratio.
Formula:
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