1. A first class lever has a load arm of 0.4 m and an effort arm of 1.2 m. What is its mechanical advantage?

2. A wheelbarrow (second class lever) lifts a load of 900 N. If the effort arm is 1.8 m and the load arm is 0.6 m, how much effort is needed?

3. Which lever class always has a mechanical advantage <1?

4. A broom is an example of a third class lever. If the effort arm is 0.2 m and the load arm is 0.8 m, what is its MA?

5. A seesaw (first class lever) balances when Child A (200 N) sits 1.5 m from the fulcrum. How far should Child B (300 N) sit?

6. A second class lever requires 150 N of effort to lift a 450 N load. What is its MA?

7. Which tool uses a third class lever?

8. A lever system has MA = 0.5. Which class is it?

9. A nutcracker (second class lever) has a load arm of 0.1 m. If the MA is 4, how long is the effort arm?

10. A shovel is a third class lever. If the effort arm is 0.3 m and the load arm is 0.9 m, how much effort is needed to lift a 60 N load?

11. Which lever class can have MA >1, =1, or <1?

12. A crowbar (first class lever) has an effort arm of 2 m and a load arm of 0.5 m. What is its MA?

13. A lever system lifts 800 N with 200 N of effort. What is its MA?

14. Which statement is true for second class levers?

15. A third class lever has an effort arm of 0.5 m and a load arm of 1.5 m. What is its MA?

16. A bottle opener (second class lever) has a load arm of 0.05 m. If MA = 5, how long is the effort arm?

17. Which lever class is best for lifting heavy weights with less effort?

18. A fishing rod (third class lever) has an MA of 0.2. If the effort arm is 0.4 m, what is the load arm?

19. A first class lever has MA = 1. What does this mean?

20. A stapler is a third class lever. If the effort is 50 N and MA = 0.5, what load can it move?