 Tom wants to lift his barrels onto the boat. However, this is difficult without mechanical advantage. With mechanical advantage, Tom has to use less force than without. For this, however, the distance that he has to use the force becomes longer. The product of force and distance always remains the same. This is also known as the Golden Rule of Mechanics. The product of force and distance remains the same and is defined as work. We differentiate between the following types of work. Lifting work is always done when a body is lifted. Even when Tom goes up the ladder, he does lifting work. He is lifting himself against the gravitational pull of the earth. When Tom jumps from the diving board, he gets faster and faster, he accelerates. In physics, we say that acceleration work is done. In almost all sports, there is always acceleration work happening. If Tom wants to shoot the arrow as far as possible, he has to draw the bow strongly. Deformation work is done here. Tom also does deformation work when he jumps on the springboard. When cycling, Tom has to press hard on the pedals because there is both friction in the air and on the road. We are talking about friction work here. The work is always done when bodies are moved against a frictional force. In general, work is done whenever a force is needed to move a body in one direction. The force points in the direction in which the body is being moved.