Elastic Collision Analysis by Tracker

Assalamualaikum wbt and have a very good morning..

Pagi yang baik bermula seawal pagi dan diikuti dengan rutin sebagai seorang ibu, hamba Allah dan tukang kebun. Alhamdulillah, syukur lah dan Allah akan tambah nikmat.

Pagi yang penuh keberkatan ini, saya ingin berkongsi tentang Eksperimen dan Analysis Tracker untuk Tajuk Momentum; Perlanggaran Elastik.

I would like to continue this discussion in English to cater all my readers which comes from all over the country.

To get the overview of Elastic Collision, I did the mind map by using the Collaborative and Creative Web Tools: https://creately.com/

Suggested Learning Activities from HSP:

1. Carry out activities/ View computer simulation to gain idea about Elastic Collision.

2. Compare  the effect of two object 

                              a) Collide from the same direction

                              b) Collide from different direction

3. View computer simulation on Elastic Collision to gain idea on the Conservation of Momentum.

4. Conduct an experiment to show that total Momentum of a closed system is constant.

These Learning Activities that seems impossible (with given 60 minutes lesson) by ticker tape now made POSSIBLE with Tracker!

      Video on the experiment

Analysing with Tracker :

1. Three graph are plotted namely;  Displacement - Time (x-t), Velocity x - Time (Vx -t)  and Momentum-Time (Px-t).

2. Try and try and try to get constant Velocity for the First ball (graph shows 0.54 ms-1)

3. Velocity of the First ball and the Second ball. We can compare with the third graph which is Px - t , from t=0.03 s until 0.23 s is the Total Momentum of the System Before Collision.

4. Time of Impact / Collision

5. Total Momentum of the System After Collision.

Analysing The Principle of Conservation of Momentum By Calculation

**Mass of Hockey ball = 0.162 kg

    Velocity of the First ball = 0.6 ms-1 ( average constant velocity)

    Total Momentum of the System Before Collision = 0.09 kgms-1

Analysing The Principle of Conservation of Momentum By the Graph

from the graph, at t= 0.333s, 

Total Momentum of The System after the Collision 

= (0.071 + 0.023)kgms-1 

=  0.094 kg ms-1 round off    0.09 kgms-1

   PAID OFF !! 😜

So this is EBL! Evidence Based Learning which engage students with the context and Hands-On, Minds On

So lets put more time on Understanding, Comprehend and Experience Physics Concept. Put more time on analysing data (graphs and tables) rather than old fashion way of utilise Ticker timer for motion of an object.

For further inquiries, might just go this You tube link which demonstrate how the analysing is done

https://www.youtube.com/watch?v=ctLibrnE3wU&t=119s

Elastic Collision and analysing