Wednesday, June 5, 2019 Day 5

Homeroom:

Grade 8 Agenda:

Homework:

Do Now:

Lesson:

Hot Air Balloon Physics: How Hot Air Balloons Fly

Forces on Hot air Balloons

  • lift

  • drag

  • thrust

  • weight

 

Buoyancy

  • Archimedes principle

  •   Force of Buoyancy - Density Difference x Volume Fluid x g

 

  For hot Air Balloons

  Fbuoyancy = (Dcoldair - Dhotair) x Volume

  Fbnet = (1.2—0.946)x2800 = 711 kg (1565 lb)

 

Building a Balloon

  •  3 dimensional patterns

  • taping

  • wire frame

  • basket

WIN:

Grade 7 Agenda:

Homework:

Do Now:

Lesson:

Make an Electromagnet