Levers A lever is a simple machine that is one of the two main simple machines. There are three types of levers first class levers, second class levers and third class levers. Levers are used to get more speed, force or precision. There are many variations of levers for example a pulley or a wheel and axle. Unlike inclined planes levers do not have that much friction because all the friction is in the fulcrum and it is only a tiny part of the lever but in the inclined plane it is throughout the whole machine. A first class lever is where the fulcrum is in the middle and the load and the effort are on the sides. If the fulcrum is closer to the load than the mechanical advantage would be above 1 but if the fulcrum is closer to the effort arm the mechanical advantage would be under 1. An example of a first class lever would be a catapult. A second class lever is a lever where the fulcrum is on one end and the load arm is always shorter than the effort arm. In a class 2 lever the mechanical advantage is always over 1. An example of a class 2 lever would be a wheelbarrow.
A third class lever is a lever where the fulcrum is at one end and the load arm is always larger than the effort arm. Therefore means that the mechanical advantage is over 1. These types of levers are used for speed or precision instead of force. For example if you were using tweezeon a splinter, you would use to much force with just your bare hands but if you were using tweezers than the thing would come out easily.
A lever is a simple machine that is one of the two main simple machines. There are three types of levers first class levers, second class levers and third class levers. Levers are used to get more speed, force or precision. There are many variations of levers for example a pulley or a wheel and axle. Unlike inclined planes levers do not have that much friction because all the friction is in the fulcrum and it is only a tiny part of the lever but in the inclined plane it is throughout the whole machine.
A first class lever is where the fulcrum is in the middle and the load and the effort are on the sides. If the fulcrum is closer to the load than the mechanical advantage would be above 1 but if the fulcrum is closer to the effort arm the mechanical advantage would be under 1. An example of a first class lever would be a catapult.
A second class lever is a lever where the fulcrum is on one end and the load arm is always shorter than the effort arm. In a class 2 lever the mechanical advantage is always over 1. An example of a class 2 lever would be a wheelbarrow.
A third class lever is a lever where the fulcrum is at one end and the load arm is always larger than the effort arm. Therefore means that the mechanical advantage is over 1. These types of levers are used for speed or precision instead of force. For example if you were using tweezeon a splinter, you would use to much force with just your bare hands but if you were using tweezers than the thing would come out easily.