Grade 7 Lesson
Do Now:
Homework:
Aim to Finish your Lost World Project by the end of vacation!
Today’s Agenda:
Structures: Force Diagrams
Choose three of the following objects.
Make a nice drawing of each.
Add vectors to show the loads on the object.
Assume the loads and forces are balanced.
Color the Indicated parts to show which of these forces affect it.:
Tension: blue
Compression: Red
Flexure: Purple
Torsion: Orange
A table in the classroom with a 40 pound load of books in the middle of it.
Color the legs and the “lintel” of the table.
The projector hanging fromt he ceiling on a metal pipe. The projector weighs 10 pounds.
A 100 pound student standing on a chair.
color the legs and the seat of the chair.
Two students playing tug-o-war with their best friends braids. Each student us pulling with 1 Newton of force.
A child sitting on a swing. The child weighs 45 pounds
color the chains that hold up the swing
A student walking across a board that bridges a pit of snakes. The student weighs 85 pounds.
color the board across the pit of snakes