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23S02

2023 T2W3

Physics HBL Day

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Group 1

  • Team members:
  • 1. Vishnu
  • 2. Jun Wai
  • 3. Khiem

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Group 1

Angular velocity and Centripetal acceleration are related by the given equation:

a꜀- Centripetal acceleration

r- radius of motion

ω- Angular velocity

It can be observed that radius is one of the variables that can affect both centripetal acceleration and angular velocity.

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However, we decided to explore how the tilt in circular motion actually affects a꜀ and ω.

θ

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Our procedure:

r

We kept the phone at the same distance away from the centre of the bike wheel.

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We spun the wheel and and collected data for a꜀ and ω for 20 revolutions for different tilt angles. We also ensured that we spun the wheel in the same counter-clockwise direction(in attempt to keep all variables constant)

To measure the tilt angle, we used the leveling feature on the phone. We took the vertical angle as the tilt angle while keeping the horizontal angle to same. We had to stack items to vary vertical angle.

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θ=5°

Our findings:

θ=0°

θ=11°

θ=16°

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Our results alone do show that as the tilt angle of motion increases, the angular velocity and centripetal acceleration increased. This can be observed by the rightward and slight upward shift of the cluster of plots as well as the increased precision of the plots(tightening of the cluster).

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However, we still believe that our results are inconclusive due to many experimental errors:

-Unable to keep the wheel spinning at a constant speed

-Unable to collect data at regular intervals of θ due to the difficulty in doing so

- Lack of precision in the plots which means deciphering relationship is very difficult

- Tilt angle was changing as the weight of the wheel was compressing the stacking items

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Our Take-away

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Group 2

  • Team members:
  • 1. Aaron
  • 2. Xu Heng
  • 3.

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Group 2

  • Aaron

Aaron’s method: Salad Spinner Bowl�Use cloth as a padding for phone�Spin the Bowl for approximately 15 secs.

Aaron’s results: As the Angular Velocity increases, the Acceleration generally increases. The results may be inaccurate as the salad spinner may not be a complete circle, causing some results to be inaccurate

Chart of Acceleration against Angular Velocity

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Group 2

  • Xu Heng

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Group 3

  • Team members:
  • 1. jet
  • 2. zheng kai
  • 3. nolan

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Group 3

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Group 4

  • Team members:
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Group 4

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Group 5

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Group 5

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Group 6

  • Team members:
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Group 6

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Group 7

  • Team members:
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Group 7

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Group 8

  • Team members:
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Group 8

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Group 9

  • Team members:
  • 1. anushri
  • 2. ai qi
  • 3. daphane

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Group 9

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Group 10

  • Team members:
  • 1. delwyn
  • 2. reanne
  • 3. jeslyn

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Group 10

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