lever+lab+report

Questions: - How is effort force affected when applied closer to the fulcrum?

Hypothesis: - If the effort force get closer to the fulcrum then the force between the effort force and load force will be less.

Variables: - Controlled variable - position of fulcrum and load force and effort force Independent variable - effort force Dependent variable - the location of effort force applied

Materials: - meter stick, bar, load (weight), sensors, pencil.

1. The smaller end of the meter stick will be for the load force. (The 0cm end). This means that the load you are trying to lift should be at this end. 2. The larger end of the meter stick (the 100-cm end) will be for the effort force. 3. Set up your lever like a meter stick with no weights, and the fulcrum close to the middle so the lever acts like a see-saw, balanced in the middle. 4. Put a load of 50 g at the LOAD END of the lever. Put the load as close as possible to the end of the lever. Be careful that the fulcrum stays in place. 5. Apply a force by pushing the Force Sensor down on the FORCE END of the lever. Add **//just//** enough to lift the load. 6. Record the newtons you need to lift the load. (I've done this one as an example below). 7. Repeat steps 4- 6 changing the Effort Force Distance. 8. Record the data in the data table.
 * Instructions: **

Fulcrum At (cm) || Load at End of Ruler (g) || Load distance (cm) (from fulcrum to load) || Effort Force needed (newtons) || Effort Force Distance (cm) || 50 || 100 ||  49 ||  ||  50cm || 50 || 100 ||  49 ||  ||  55cm || 50 || 100 ||  49 ||  ||  45cm || 50 || 100 ||  49 ||  ||  40cm ||

Fulcrum At (cm) || Load at End of Ruler (g) || Load distance (cm) (from fulcrum to load) || Effort Force needed (newtons) || Effort Force Distance (cm) || 40 || 100 ||  40 ||  2.0N || 50cm || 40 || 100 ||  40 ||  1.7N || 55cm || 40 || 100 ||  40 ||  4.4N || 30cm || 40 || 100 ||  40 ||  6.7N || 20cm || 30 || 100 ||  30 ||  14.5N || 10cm || 30 || 100 ||  30 ||  5.5n || 25cm || 30 || 100 ||  30 ||  10.2 ||  15cm ||

Conclusion: - my hypothesis is correct in addition I tried it with the ruler, fulcrum and the effort force as I noticed when the effort force get closer the force (Newton’s) is decreased and when the effort force get farther the force get increased.

Suggestion for improvement: - for future examination, we should try to do on the different class of lever and check whether the hypothesis are similar or different.