PBL: Oh Poor Chicken! (Elasticity)

Assalamualaikum wbt and have a good day everyone.

For our second class (Technology and Innovation) we was taught by Dr. Nurulhuda to design  Problem for T&L. In 5 minutes I finish my task (with few correction by D. Nurul.. hicks 😂 ). Its really no trouble for me at all to design problem for PBL since I always ask myself am I able to design PBL? and Yes. I am able to do that.

Thinking...thinking....  what do I know about this problem?

Group 1: 

• Discuss about the thickness of the catapult and find the spring constant, k for brother's and fathers' catapult from the internet, Next they find the extension, x of each rubber and finally find its Force, F.
• Plotting the graph of F against x to find W = area under graph
• Compare the energy of both catapult by equation E = 1/2 kx2

Presentation by Harpreets' group.

Impromptu correction during presentation and calculatin of Potential Energy by equation

Finding Potential Energy by graph, Work done is equal to area under graph

Group 2: 

• Same as Group one (with different value of k, x and F due to different source of information in the internet) 
• Extension: Discuss Transformation of energy. 
• Potential Energy possess by the rubber band when pulling it TRANSFER to Kinetic energy possess by the pebble/ piece of paper once the rubber of the catapult is release.
• Find the velocity of the pebble/ piece of paper by equation Kinetic Energy = 1/2 mv2
• Find the Momentum posses by the pebble / paper by equation Momentum = mv

Presentation by Asilahs' group

Group 3:

• Same as group 1.
• Extension: Discuss about Intermolecular Force in the rubber during extension and compression

Previshna weighing a pebbles for next extension activity

                                                To be continue.....................................................