lever, gear train
You can grip things tightly with them.
A 3rd class lever makes things easier by increasing the distance over which a force is applied, allowing for greater speed and range of motion. Although it does not provide a mechanical advantage in terms of force, it can enhance the speed or range of movement of an object or body part.
To calculate mechanical advantage, you need to know the effort force applied to the machine and the resistance force it is able to overcome. By dividing the resistance force by the effort force, you can determine the mechanical advantage of the machine.
It reduces weight of other things known as the load. Also can increase energy output, IE; a push bike with gears.
The mechanical advantage may be less than that calculated by the formula due to factors such as friction, efficiency losses, or flex in the system. Real-world conditions can impact the actual mechanical advantage achieved in a system.
The more moving/mechanical components in a system the greater likelihood of a part failing. remember that no part is ever manufactured exactly, there is always a tolerance (an amount the dimension/specification can vary by) cumulatively this increase the more parts you add. Basically a simple machine has less things that can break and is easier to maintain.
A screw can make work easier by converting rotational motion into linear motion. This allows for greater control and precision when tightening or fastening objects. Screws also provide mechanical advantage, requiring less force to achieve the same amount of work.
A mechanical advantage greater than one means you can perform more work than the effort you expend. The mechanical advantage gives you more capability. A mechanical advantage of only 1 means you really do not have any advantage.
If you get more force out of a machine than what was put into it, that is mechanical advantage. Levers and gears use this principal to amplify their output.
The advantages are the things we use as bikes stove these are examples and advantages. The disadvantages are guns and other dispicable examples.
Wet things are provide less resistance to electricity
a mechanical designer designs and make mechanical things