Activity 5 for Lost - a Stage Two Unit - Movement and Energy (machines)
Information
A force is a push or a pull on an object.
There are three types of forces that act on all objects on earth.
They are friction, gravity and magnetism.
Materials
- string
- ruler
- rubber bands
- your pencil case
- sticky tape
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Procedure
1. Attach a rubber band to the pencil case with a piece of string.
2. Experiment 1. Place the ruler on your desk and rest the pencil case along the ruler near the end that says 0cm .
3. Drag the pencil case along the ruler with the rubber band and try to measure the length of the rubber band. Have another member of the group use a different ruler to measure how long the rubber band is stretched to make the pencil case move.(You need to drag it with a steady, constant force to keep the length of the rubber band constant.)
4. Experiment 2. Elevate the ruler, that is on the table, with a few books so it makes a ramp.
(Another name for a ramp is an inclined plane)
5. Try to drag the pencil case up the ruler with the same force as before. Measure the length of the rubber band as you drag it up.
6. Experiment 3. Lift the pencil case up vertically with the rubber band and measure its length.
1. Attach a rubber band to the pencil case with a piece of string.
2. Experiment 1. Place the ruler on your desk and rest the pencil case along the ruler near the end that says 0cm .
3. Drag the pencil case along the ruler with the rubber band and try to measure the length of the rubber band. Have another member of the group use a different ruler to measure how long the rubber band is stretched to make the pencil case move.(You need to drag it with a steady, constant force to keep the length of the rubber band constant.)
4. Experiment 2. Elevate the ruler, that is on the table, with a few books so it makes a ramp.
(Another name for a ramp is an inclined plane)
5. Try to drag the pencil case up the ruler with the same force as before. Measure the length of the rubber band as you drag it up.
6. Experiment 3. Lift the pencil case up vertically with the rubber band and measure its length.
Observations
Record your observations in your notebook. Make a heading, 'Measuring a Force'. Write and draw your observations. Don't forget to label your drawings. The following questions may help you to focus.
Which is the easiest way to move the pencil case?
Which method stretched the rubber band the most? Why?
Record your observations in your notebook. Make a heading, 'Measuring a Force'. Write and draw your observations. Don't forget to label your drawings. The following questions may help you to focus.
Which is the easiest way to move the pencil case?
Which method stretched the rubber band the most? Why?