Practical Application Ligaments, bones and muscles are all examples of levers that allow humans to move. Real World Examples Levers can be found in crowbars, seesaws, backhoes, and shovels. Challenge Yourself Fill a wheelbarrow with sand or soil. Try lifting the wheelbarrow at the end of the arms and also at the base of the arms closest to the bucket. Notice which is easier. Tug-of-war is a sport played all over the world and it was an Olympic sport from 1900 – 1920. Did You Know ? AT HOME EXPERIMENT Exhibit Key Concept Mechanical Advantage