Activity 7 for Lost - a Stage Two Unit - Movement and Energy (machines)
The fulcrum is the point where the arms are pivoting.
Information
Levers are used to move loads. They all have three parts:
1. a load 2. a fulcrum and 3. an arm.
Materials
- Ruler
- Pencil
- Plasticine or playdo
- Sticky tape
Procedure
1. Experiment 1. Use sticky tape to attach a pencil to the bottom side of a ruler. Make sure it is in the middle.
2. Place this on your desk and see if you can balance two equal sized pieces of plasticine at each end, like a see-saw. This is what is called a lever.
3. Experiment 2. Double the size of the plasticine on one end. Move the plasticine along the ruler to keep it balanced.
1. Experiment 1. Use sticky tape to attach a pencil to the bottom side of a ruler. Make sure it is in the middle.
2. Place this on your desk and see if you can balance two equal sized pieces of plasticine at each end, like a see-saw. This is what is called a lever.
3. Experiment 2. Double the size of the plasticine on one end. Move the plasticine along the ruler to keep it balanced.
Observations
Record your observations in your notebook. Make a heading, 'Leave it to Levers'. Write and draw, add labels, your observations. The following question may help you to focus.
1. How did you still keep the ruler balanced when the size or weight of the plasticine were not equal?
Record your observations in your notebook. Make a heading, 'Leave it to Levers'. Write and draw, add labels, your observations. The following question may help you to focus.
1. How did you still keep the ruler balanced when the size or weight of the plasticine were not equal?