The definition of a machine is a device that reduces human effort, so yes.
Yes. Since more work goes to counter the friction force, less work goes to do the actual function of the machine.
For a machine with efficiency less than 100%, the output work will always be less than the input work. This is because some of the input work is lost as waste energy due to factors like friction, heat, or other inefficiencies in the machine. The efficiency of a machine is a measure of how well it converts input work into useful output work.
The amount of work that a machine does is less than the input work due to energy losses in the form of friction, heat, and inefficiencies in the machine's operation. These losses result in some of the input work being dissipated and not translating fully into useful output work performed by the machine.
No machines don't really give you less work you are still doing work by turning on the machine
When a machine has an efficiency less than 100%, it means that not all of the input work is converted into output work. Some of the input work is lost as waste energy, usually in the form of heat or friction. This results in the output work being less than the input work applied to the machine.
Then the output work is less than the input work. That description applies to every machine that has ever been built or will ever be built.
In a real machine, part of the energy (or power) is always wasted.
Increasing the efficiency of a simple machine means that it requires less input work to produce the same output work. This results in less wasted energy and ultimately allows the machine to do more work with the same amount of input.
No, a simple machine with less output work than input work is said to have less than 100 percent efficiency. Efficiency is a measure of how well a machine converts input work into output work, with 100 percent efficiency meaning that all input work is converted to useful output work.
In an ideal universe, where there are no friction or heat transfer losses, work out = work in. In our universe, however, work output is always less than input. How much less depends on the efficiency of the machine's design.
The output work of a machine is typically less than the input work, due to factors such as friction, heat loss, and other inefficiencies in the machine's operation. This difference between input and output work is known as the efficiency of the machine.
it lets you work easier with less effort