Results:

Number of blades- 3
Distance the fan is away the from windmill- 80cm

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Windmill blade angle- 20 degrees

Trial 1- 36 turns/rounds

Trial 2- 42 turns/rounds

Trial 3- 41 turns/rounds

Average- 40 turns/rounds
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Windmill blade angle- 40 degrees

Trial 1- 21 turns/rounds

Trial 2- 18 turns/rounds

Trial 3- 26 turns/rounds

Average- 21 turns/rounds

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Windmill blade angle- 60 degrees

Trial 1- 19 turns/rounds

Trial 2- 13 turns/rounds

Trial 3- 18 turns/rounds

Average- 16 turns/rounds

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Conclusion: the windmill blade angle 20 degrees and the round turn is the best. ( 20 degrees for a windmill blade angle is the most efficient.)

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yes dion will be going to the sci lab but i will not be going bcoz i dont have the time to. i had tested the experiment pls call marissa for further details.


these pictures were taken on the 15th, monday.
they show the process of making the blades.
they are done but we have yet to start the project, which is soon.














hey, just want to confirm, are we going to gather at the physics lab this friday (26/6) at 1230? can't use my phone to reply cos it's spoilt. thanks, nicole.


Group Name: Lactobacillus Class: 1B
Members: 1. Marissa Ng
2. Soh Hong Yuan
3. Nicole Lum
4. Dion Lim

Project Title: Physics

Problem Question: Which windmill blade is the most efficient?

Hypothesis: A larger windmill blade angle will be more efficient.

Apparatus and Meterials needed:
Mounting board
Sticks
Standing fan
Protractor (XL)
Long ruler
Pen knife
cardboard box

Experimental Procedure Setup:
1.Cut the mounting board into the e of 30cm x 10cm
2.Stick the stick onto the mounting board
3.Tilt it to the angle of 180 degrees
4.Poke the sticks into a cardboard box
Make sure the box can rotate freely.
5.With the fan blowing at a distance of 1metre away, time how
long it takes for it to turn 5 rounds
6.Repeat step 3 to 5 with a few different angles
7. observe the results

Independent Variable: Angle of the blade
Dependent Variable: How long it takes for the blade to turn 5 rounds
Controlled Variables (constants):
1.length of blade
2.distance of fan from blade
3.length how much of stick was poked into the cardboard box.