level: Level 1 of Levers
Questions and Answers List
level questions: Level 1 of Levers
| Question | Answer |
|---|---|
| What is a lever? | Rigid bars that rotate around an axis or fulcrum |
| What is needed for a lever to move or overcome a resistance? | A force to be applied |
| What in the body is the rigid bar? | bone or ligament segment |
| What in the body is the fulcrum/point of rotation? | the joint |
| What in the body is the force/effort? | the muscles |
| What is the load? | the resistance - its an external force (gravity, contact or collision) |
| What is the 1st class lever? | The fulcrum/axis is between the load and the force |
| What is the 2nd class lever? | The load is between the fulcrum and the force |
| What is the 3rd class lever? | The force is applied between the fulcrum and the load |
| What is the torque? | Torque is the degree to which a force tends to rotate an object about a specified fulcrum |
| What is a mechanical advantage? | Mechanical advantage is defined as the ratio of the force moment arm (distance from the fulcrum) divided by the resistance moment arm (distance from the fulcrum) |