ASVAB Mechanical Comprehension Practice Test 653530
Third-Class Lever
A third-class lever is used to increase distance traveled by an object in the same direction as the force applied. The fulcrum is at one end of the lever, the object at the other, and the force is applied between them. This lever does not impart a mechanical advantage as the effort force must be greater than the load but does impart extra speed to the load. Examples of third-class levers are shovels and tweezers.
If this lever is in equilibrium with an effort force of 16.67 ft. lb. at the blue arrow and a resistance force of 5 ft. lb. at the green box, what is its mechanical advantage?
| 0.3 | |
| 3.3 | |
| 0.1 | |
| 0.15 |