which class has most mechcanical advantage in simple machine
Answers
Answer:
A first-class lever is a simple machine that lifts a load across a pivot point called a fulcrum. It differs from all other classes of levers because the fulcrum exists between the load and the force that lifts it. A teeter-totter is an excellent example of a first-class lever because it demonstrates how the lever works and is an iconic image from childhood. First-class levers exist in many common locations, such singly in engine pistons or in pairs in scissors and pliers.
Answer:
First-class levers have a considerable practical advantage over the other types of levers. They convert a downward moving force into a lifting force. This means that you can always augment your ability to lift a load across a teeter-totter style lever simply by using the force of gravity.