Week 5

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Week 5


Big Question:

How can we design a safe and durable playground surface? 

    A swing slows and stops from the energy lens because as the swing goes back and forth, the mass is hitting into air particles and creating thermal energy (Etherm), or friction. If the swing starts off with 10 units of energy and the motion goes down to 8 units, the two units of energy aren't lost, they are just transferred into the thermal energy which causes the air particles to move faster creating friction and causing the swing to slow. 

    The force lens on motion tells me I need a force to accelerate something, speed up slow down or change directions. The force of gravity pulls down, air drag points the opposite of velocity, the force from the rope is pulling in the direction the rope is pointed. 

Forces come in equal pairs (each acting on a different object)

We then looked at what we do in science vs. engineering. 

Science:

  • Investigate phenomena 
  • Uncover and use new science principles to discover
Engineering:
  • Solving problems
  • Designing solutions
  • Use science ideas to design solutions
Our group designed a  

Newtons third law:
Forces come in equal pairs that are each acting on different objects. If the egg pushes on the surface, than the surface is pushing on the egg equally as hard. If a pushes on b to the right, then b pushes on a to the left. 

Key takeaways
Science ideas and practices:
  • Force
  • Energy
  • Friction
  • Acceleration
Science Pedagogy:
  • Let students figure it out






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