08-01-10        IB3, Katedralskolan        Shiba Younus

Muffin forms

Research question: How is the average velocity of a falling muffin form, released from 2 meters, affected by its mass?

Hypothesis: Increase in the mass of the muffin form results in an increase in its velocity while falling.

Controlled variables: Release height, air resistances

Independent variables: Mass of muffin form

Dependent variables: Average velocity

Controlling variables:

  1.  2 meters was measured and a mark was put on the wall from where the bottom of the muffin form was to be released. It was ascertained that the line of sight lied at the same level as the mark on the wall.
  2. Air resistance was controlled by having the same muffin forms all the time so that the surface area remains the same, and mass was added inside that form. It should be noted that if the average velocity is affected by the mass, we cannot control the air resistance completely.
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Materials:

  • Measuring tape (± 1 cm; estimated)
  • Scale 2000 ± 1g
  • Stopwatch ( ± 0.10 second; estimated)
  • Muffin forms

Method:

  1. A height of 2 meters was measured and marked on the wall.
  2. The mass of five muffin forms was measured collectively; they were then released from two meters and the time taken for it to fall was measured. This was repeated 10 times.
  3. Five more muffin forms were added to the previous five forms and step two was repeated.
  4. In this manner, readings were taken for 15, 20, 25 and 30 muffin forms.
  5. The average velocity ...

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