Examples of first-class levers include a balance scale, a seesaw and a crowbar. A first-class lever places the fulcrum in the middle of the effort and the load.
A first-class lever is a beam, rod or stick with the load at one end, the fulcrum in the middle and the force applied on the other end. A good example of a first-class lever is a child's see-saw.
A first-class lever, in which the fulcrum is between the load and the effort, can aid in work by changing the direction of the force and by increasing the efficiency or mechanical advantage of the force applied. The forc...
Examples of second class levers include doors, staplers, wheelbarrows and can openers. In a second class lever, the load is found between the effort and the fulcrum. The direction of the effort and the load are the same.
Some of the types of first-class levers include crowbars, scissors, seesaws, fishing rods, pliers, balance scales, trebuchets and hammers when removing nails. All of these levers have a fulcrum positioned between load an...
Third-class levers have an input force, a fulcrum and an output force. The placement of the fulcrum, input and output forces of the lever determines its type.
Examples of fluid friction include hailstones falling from the atmosphere, the drag of air on an airplane, water slowing the speed of a boat, air slowing a bullet and fish swimming underwater. Fluid friction occurs aroun...