23S03

2023 T2W3

Physics HBL Day

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Group 1

• Team members:
• 1. Kaung
• 2. James
• 3.

Group 1

• Using an office chair while it was positioned normally, the below a to w graph and a to w^2 graphs were obtained.�
• Challenges: spinning the chair smoothly was difficult as not only did the top part of the chair (where the phone was placed) shake around but the wheels of the chair also started moving, causing large amounts of inaccuracy.�
• One way to resolve these issues would be to lock the chair in place with heavy weights and also secure the chair more tightly.

phone placed here

Group 2

• Team members:
• 1. brian
• 2. chan en
• 3. aaron

Group 2

• Feel free to do up the slide and add more slides if required.

Group 3

• Team members:
• 1. Javier
• 2. Wayne
• 3. Hoiyin
• 4. Arthur

Group 3

• Feel free to do up the slide and add more slides if required.

Group 4

• Team members:
• 1. Naaman
• 2. Angela
• 3. Yu Hng

Group 4

Yu Hng:

From the recordings, it shows that acceleration is directly proportional to the angular velocity squared.

Group 4

Naaman: Circular motion of blades of a ceiling fan

The experiment could only be run for a short time as the ceiling fan, even at lowest speed, shook violently due to the weight of the phone.

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From the graph, it can be seen that

acceleration is directly proportional to the

square of the angular velocity.

Group 4

Angela: Circular motion of Bicycle wheel

As the bike had to be lifted which caused it to wobble as it spun, thus it was not easy to rotate the wheel of the bicycle at varying speeds as the rotation was not smooth, and the data was inconsistent.

When the position of the phone was changed to nearer the centre of the wheel, the a-w² graph has a smaller gradient.

What we have learnt from this experiment.

• Angular velocity is the rate of change of the rotation of an object about an axis.
• The acceleration of the object is perpendicular to the velocity of the object.
• Some real life examples of angular velocity are: a race car travelling on a circular path, a person riding a ferris wheel and a spokes on a rotating bicycle wheel.
• When the object is at the center, angular velocity of the object is undefined as the axis on which the object rotates passes through the centre of the circle.

Group 5

• Team members:
• 1. Mei Ying
• 2. Clare
• 3.

Group 5

Experiment #1: Circular motion of ceiling fan

Fan speed was put at the lowest to avoid letting the phone come loose from the tape while the blades were spinning.

From the graph it can be seen that acceleration is directly proportional to the square of angular velocity.

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Group 5

Experiment #2: Circular motion of mop

The pole of the mop could only be pressed down once as if pressed down repeatedly the motion of the base of the mop would slow down and speed up again repeatedly, leading to inaccurate results. Therefore.the graphs have very few points (orange dots).

From the graph it can be seen that acceleration is directly proportional to the square of angular velocity. (put slideshow to see the video)

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Group 6

• Team members:
• 1.Javon
• 2.Joshua
• 3. Jordan

Group 6

Data- Gyroscope

Analysis

We have learnt that data is not consistent because the rate of spinning of the chair is not varying

Photo of circular motion

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Learning pointers

• We have learnt how long it takes for one complete spin ​
• We have learnt that velocity is constantly changing in circular motion as direction is always changing ​
• Acceleration is in the same direction as the change in velocity towards the centre of circular motion in the vector diagram

Group 7

• Team members:
• 1.
• 2.
• 3.

Group 7

• Feel free to do up the slide and add more slides if required.

Group 8

• Team members:
• 1. Max
• 2. Sihui
• 3. Lara

Group 8

Sihui:

From the graph, we can see that angular velocity is directly proportional to acceleration as there is an increasing trend.

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As the phone was only held on to the exercise equipmemt by some tape, it may have been a bit shakey, causing the results to be less accurate and fluctuate a little. However, an overall increase is still observable.

Group 8

Lara:

From the graph, as the angular velocity increase, acceleration increases.

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As i had to tilt the bike to allow the wheel to spin freely, the bike was a little bit shaky as the wheel spun, which could have resulted in the data collected being inconsistent.

Group 8

Max

Group 9

• Team members:
• 1. Xiaoli
• 2. Martin
• 3. Alanna

alanna:

From the graph, it can be seen that as angular velocity increases, acceleration also increases – they have a direct relationship.

However, the salad spinner was too small for the phone to be propped up at the side, hence the phone stays relatively in the same position as it spins, which may give inaccurate results.

xiaoli : Circular motion of Bicycle wheel

As the rotation was not smooth and I had to manually move the wheels, the speed became very inconsistent. Thus resulting in inconsistent readings.

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Furthermore, when the wheel is spun too fast, the phone is unable to record down the timings.

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From the graph, we can conclude that acceleration is directly proportional to the square of the angular velocity.

martin

the readings show that acceleration is proportional to angular velocity, although readings may not be very accurate because my chair like not v good to use i think

Group 10

• Team members:
• 1. Randall
• 2. Ronald
• 3. Kyle

Group 10

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• Tape was used to make sure the phone was held tightly in place to prevent phone from wobbling
• acceleration is directly proportional to angular velocity squared.
• there was problems getting the chair to move smoothly as the chair kept moving around on its wheels
• The chair was spinning while being held in place to minimise the movement of chair

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