Interview
IEB Grade 12 Work, energy, power and momentum notes
- Course
- Institution
This document includes notes on work, energy, power and momentum from the IEB SAGS. It contains all the IEB SAGS definitions.
[Show more]
Seller
Follow
sadepeleowo
Reviews received
Content preview
grade 12-
I :
work
and the
>
the work done on an object by a force is the
product of displacement ( Ox )
component of the force (F) parallel the displacement (N)
to
→ force
scalar work CJ ) l
W FOX
quantity
> =
'
displacement cm )
work done
energy transferred J N m
> =
.
.
.
1. l positive and negative work
>
whether
energy is transferred ( gained ) / removed ( lost ) depends ,
on the direction of the
force and its displacement
>
component of force in the direction of the displacement positive
,
work is done (transfer )
component of force direction of the displacement is done
negative
>
in the opposite ,
work
( removed )
°
1. 2 Forces at 90
> horizontal component of this perpendicular force is zero ( Fx -
-
O)
> zero work is done on an object by a force which acts perpendicular
to its displacement
1. 3
Requirements
Object (ox )
•
must move >O
object move in same plane ( x component )
•
must
-
force object for the entire distance
•
must act on
,2. Energy
2. 1 Gravitational potential
energy
>
energy an object posses due to its position relative to reference point
scalar
quantity Ckg )
>
> mass
gravitational Ep Mgh vertical height ( m )
= >
potential
energy (J )
(9,8ms 2)
-
>
acceleration
2. 2 kinetic
energy
object has result of object 's motion
>
energy an as a the
1ms )
"
>
scalar
quantity
>
speed
Ek Em v2
energy CJY
=
kinetic
2. 3 Mechanical
energy
> mass Ckg )
of its and kinetic
sum
gravitational potential energy energy
>
>
scalar Em Ep Ek
quantity
= +
The Law of conservation of
2. 4
Energy
> the total
energy in a
system cannot be created nor
destroyed ; only transferred
from one form to another
2.5 The principle of conservation of mechanical energy
> in the absence of air resistance or
any external forces ,
the mechanical
energy of
an object is constant
>
Epi
+
Eki =
Epf +
Ekf
> external forces :
friction applied forces and normal forces
,
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 sadepeleowo. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $6.18. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
79976 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now