A lever can be found on a wheelbarrow, such as the one illustrated below. The wheel serves as the lever's fulcrum; the effort force is delivered to the handles; and the load is in between. The lever facilitates lifting the weight before it is rolled. Before that, it would require more than one person's strength. The term "wheel fulcrum" is also used for a similar structure found on some other types of wheels, such as cartwheels and rotary-powered wheels like those used on lawnmowers and garden tractors. However, they are not true levers because there is only one point of contact with the ground. A true wheel lever has two points of contact with the ground: one at each end. Thus, it delivers twice the lifting power of a single-point fulcrum. The word "fulcrum" comes from a Latin phrase meaning "support". In mechanics, a fulcrum is a point or area where forces are balanced. A simple example is when you stand on a board to push against a wall; now imagine if you could lift both you and the board up against the force of gravity! At the fulcrum, the force acting down on you is equal to the force acting up on the board. If you move either you or the board away from the center, then there is no longer a balance of forces and thus no longer resistance.