Because the load is always between the effort and the fulcrum,
so the effort arm is always longer than the load arm.
Class 1 and Class 2 levers always have a mechanical advantage greater than 1. In a Class 1 lever, the input arm is longer than the output arm, while in a Class 2 lever, the output arm is longer than the input arm, resulting in a mechanical advantage greater than 1.
Mechanical advantage is not the only reason to use levers.
No, not all levers have a mechanical advantage. The mechanical advantage of a lever depends on the specific positions of the effort, load, and fulcrum. Some levers may have a mechanical advantage of less than 1, resulting in a decrease in force but an increase in distance.
functional levers
The spokes of a wheel are comparable to levers. Longer spokes give more mechanical advantage. Even in a wheel that is solid, and has no spokes, the greater the diameter, the greater the mechanical advantage.
The mechanical advantage of a second-class lever is always greater than 1. This means that the output force is greater than the input force, making it advantageous for lifting heavy loads. Examples of second-class levers include wheelbarrows and nutcrackers.
Levers are a big deal when it comes to Mouse Trap Cars, levers help make the mechanical advantage and ideal mechanical advantage higher and better.
1st order levers have the fulcrum between the load and effort arms. The mechanical advantage of these levers can be greater or less than 1, depending on the length of the arms.2nd order levers have the load portion between the effort portion and the fulcrum. These always have a mechanical advantage greater than 1. They increase the force exerted at the expense of distance.3rd order levers have the effort portion between the load portion and the fulcrum. These always have a mechanical advantage less than 1. They decrease the force exerted with a gain to the distance.
They don't, they just give you a mechanical advantage.
The mechanical advantage of a third-class lever is always less than 1, meaning that the output force is greater than the input force. Third-class levers are designed to increase speed or range of motion rather than force. Examples of third-class levers include tweezers and forearm muscles.
mechanical advantage is the output force divided by the input force
In a second-class lever, the output force is always greater than the input force. This is because the load is positioned between the fulcrum and the input force, allowing for mechanical advantage to be achieved. Examples of second-class levers include wheelbarrows and nutcrackers.