LEVERS 2

MATERIALS

PROCEDURE 1. Label one sticker "L" for __________ and stick it at the "1 inch" end of the lever. Label the other sticker "F" for __________ and stick it at the "12 inch" end.

2. Put the fulcrum at the 6" mark of your ruler - in the middle of the lever.

3. Put a load of one weight at the end of the lever marked "L". Put the load as close as possible to the end of the lever. Be careful that the fulcrum stays in place.

4. Apply a force by putting weights at the "F" end of the lever. Keep them as close as possible to the end and be careful that the fulcrum stays in place. Add enough weights to lift the load. Use one or two pennies if you need to.

5. Record the number of weights needed (but not the pennies).

6. Repeat this for the same load (2 weights) but with the fulcrum in different positions. Record your results.

FULCRUM ATLOADFORCE NEEDED
42
62
82

CONCLUSION

Based on this experiment, what can you recommend about how to make it easiest to lift a load with a lever?

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CHALLENGE

How can a lever be used to weigh something? Describe it below in words and pictures.