READING RESPONSE: REVISE, EDIT & RESUBMIT EVERYONE
I can relate to Bud’s rule about creating and remembering
a simple lie to get out of a sticky situation.
I recall a time when…
I think this is a fundamental life skill…
Bud cleverly devised this
rule when…
I can relate to Bud’s rule about ensuring adults don’t
use something you value as leverage against you.
I recall a time when…
I think this is a fundamental life skill…
Bud cleverly devised this
rule when…
I can relate to Bud’s rule about deciding promptly to do
something and not over-thinking it.
I recall a time when…
I think this is a fundamental life skill…
Bud cleverly devised this rule when…
due tomorrow
Science:
Forces acting on Structures
-Gravity is the force of attraction between all
objects.
-When I lift any heavy object, gravity always pulls it
downward to the ground.
-Gravity pulls any object to the ground without touching
it and is therefore a non-contact force, for example, the pull between
magnets.
-An applied force is the push/pull of objects
contacting each other, for example, the contact between a swinging racquet and
moving tennis ball.
-Mass is the amount of matter in any object
measured in grams, kilograms, pounds etc.
-Weight is the force of gravity acting downward on
any object measured in Newtons.
-Dynamic loads are not caused by gravity, for
example, a strong wind that pushes on a tree or rushing water that floods a
street.
-Live loads like cars and trucks carrying people/cargo
is a force acting on a bridge.
-The weight of the bridge structure itself (steel,
concrete) is a dead load acting on the bridge.
-a leaf falling from tree: non-contact
-kick soccer ball: applied
-hammer nail: applied
-magnets: non-contact
-waves vs swimmer: applied
-snow on roof/ice on tree: static “live” load which can cause damage
-empty swings: static “dead” load
-car into fence: dynamic
-wind vs sailboat: dynamic
-dictionary on desk: static “live” load
-bricks of house: dead load – forms structure itself
-diver on board: live load
Science
Task: Forces acting on Structures
Independent
or 2 Partners
Select a structure such as a highway bridge, suspension walking
bridge, swing set, playscape structure, bouncy castle, staircase, car
suspension, roof etc.
On the diagram of the structure identify with arrows and
text an example of a dead load, a live load and a dynamic load. Explain how each force acts on the structure.
See example pg.273 textbook