Reflections - First Day

What did you do today?

I did the Fastest Ball Challenge, the Fastest Dive Challenge and the first part of the Extraction of Caffeine form Beverages project.

Briefly describe your days activities.

0900Arrive at NTU School of Physical and Mathematical Sciences
0905 - 0915Briefing on Fastest Ball Challenge
0915 - 1030Trials and Tests (Fastest Ball Challenge)
1030 - 1100Break
1100 - 1230Trails and Tests (Fastest Ball Challenge)
1230 - 1400Lunch
1400 - 1415Trails and Tests (Fastest Ball Challenge)
1415 - 1420Fastest Ball Challenge
1420 - 1430Mini-Tasks
1430 - 1510Fastest Dive Challenge
1510 - 1700Introduction of Extraction of Caffeine from Beverages
1700Leave NTU School of Physical and Mathematical Sciences

What did you learn today?

I learnt that there are different ways to measure an angle, directly and indirectly. I also learnt that different fluids have different upthrust and viscosity. 

Discuss any learning points from today's activities.

We can indirectly measure an angle by using trigonometry. The angle will be called angle a. By keeping a length of the triangle constant, we can vary the other two. The first length of the triangle is the distance which ball travels from where it is being released to the point it hits the horizontal track. The second length is the length from the angle of incidence to the retort stand. The third length is the length from the inclined track where the ball is being released to the base of the retort stand. This length should be perpendicular to the base of the setup. The second length should be constant throughout the whole experiment. This second length is called the adjacent (A). The first length is called the hypotenuse (H) while the third length is called the opposite (O). 
O = H x sin (a)
When we have angle a to be 30˚ and H to be 49 centimetres,
O = 49 x sin (30˚)

How do you feel about today's activities?

I think that today's activities were exciting and being able to know the angle of inclination that will help us get the fastest timing might be of use in other school projects. 

Describe how the project has affected your understanding of the discipline and how it may be applied elsewhere.

I used to think that the angle of inclination that will have the fastest timing for a ball to travel is 45˚. After the Fastest Ball Challenge, I now know that the angle should be 35˚. 

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