Class notes
Unit 1 - Forces
- Course
- SPH4U (SPH4U)
- Institution
- White Oaks Secondary School
In class notes from the first unit of grade 12 physics, forces.
[Show more]
Content preview
Unit 1 - Physics Notes, Free Body Diagrams -
°
A force ,
E ,
is a push or a pull
The force of Fg force of attraction between all objects
gravity
•
, , is a
"
Normal force ,
En , is the force perpendicular to the surfaces of objects in contact
•
Tension force Ft exerted by materials such as ad cables that be stretched
, , , ropes ,
springs , ,
can
•
Friction force ,
Ff ,
resists the motion or attempted motion between
objects in contact ; acts in the direction
opposite to motion or attempted motion
Static friction force Is tends to stationary object from
prevent starting to
•
, , a move
°
kinetic friction force ,
Fie ,
acts
against a object 's motion
frictional
°
Air resistance force that opposes 2h
object 's motion
through air
°
Applied force F app contact force that does not fit of the above
, , My in any
categories
°
Net force E F the vector of all forces body
, ,
is sum
acting on a
Free body FB D ) body with dot ad all the forces ( )
diagrams represents showing
°
C a a ,
arrows
acting on that object
Rulesforfree.BE/4Di2gr2MS-
I .
Represent the mass in question with a pointldot
2 The point represents ALL THE MASS concentrated the centre of
. at
gravity
A force be 2 visible
ectcontact OR invisiblelremoteinteractionbetween2mas#
°
can
°
Newton 's 3rd law identifies the 2 CAction-Rea.ci#
masses
interacting
.
When
labelling forces :
2) all forces must be shown on a FBD
b) each force will be numbered I this makes it easy to coordinate between multiple diagrams , and
indicate the relationship between force sizes )
subscripts indicates
Using
•
:
c) Which 2 masses are involved
d) I
how they are
interacting
ie .
remote attraction C
gravity ) ,
2 surfaces slipping C friction ) , perpendicular
Support I from below C normal ) ,
other types of direct pushes or pulls (applied )
Ex A
•
the to
.
puck slides across ice a
stop
What the forces the ?
I .
are on
puck
planet Earth
pulling the mass ( if it wasn't the
ground that why it would drop )
-
is on even on , is
2 How the the ?
.
is ice
touching puck
It not towards
-
is
pushing
The 2 surfaces retards
are
rubbing each other
wearing away causing the puck to slow down This
-
, .
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller studyingwithcass. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for CA$4.19. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
70840 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now