Second class lever


diagram5.jpg
wheelbarrow

This is an example of a second-class lever.

If you use a wheelbarrow there will be lever in which the resistance is located between the fulcrum and the effort. The fulcrum is at the wheel and the resistance is the object being moved while the person pushing the barrow supplies the effort.

Material:
1: A person
2: A wheelbarrow
3: Different weights.

Question: How is the effort force affected if you increase the effort load and change the angle of the effort?

Hypothesis: If we add more weight and do not change the angle of the effort the person will have to use more force because if the load is not closer to the fulcrum it will require more force.

Procedure: Note position of the effort, fulcrum and the load. Ask a person to move the empty wheelbarrow. See the effort required. Increase the weight and angel of the effort and again check the effort required. Repeat this step a couple of times and note the readings.

Data collecting and processing:

Fulcrum at (angle)
Load at the center (g)
Distance between the fulcrum and effort (cm)
Effort force needed (N)
90
100
50

100
150
50



Conclusion & Evaluation:

Conclusion: My conclusion is that if you increase the angle of the effort the effort needed will be less, as the load will be pushed closer to the fulcrum.

Evaluation: If I had to do the same thing again I would try and increase the distance between the fulcrum and the effort.