Summary
Summary Work, Energy and Power
- Course
- Institution
Covers all that is needed in the Matric physics syllabus under the Work, energy and power section all definitions taken from the SAGS and includes diagrams
[Show more]
Seller
Follow
Danetucker
Content preview
WORK ENERGY AND POWERWORK
Work – the product of the displacement and the component of the force acting
parallel to the displacement
W = FcosθΔxx
W = work done on object (J)
F = component of force acting parallel to displacement (N)
Δxx = displacement (m)
θ = angle between applied force and displacement
Whenever work is done energy is transferred from one object to another
Work done = energy transferred
POSITIVE AND NEGATIVE WORK
Whether energy is transferred to or removed from depends on the
direction of the force and its displacement
Only components of force acting parallel to displacement count as work
Force same direction = energy transferred to = positive work
Force opposite direction = energy removed from = negative work
, GRAVITATIONAL POTENTIAL ENERGY
Gravitational potential energy – the energy an object possesses due to its
position relative to a reference point
Ep = mgh
m = mass (kg)
g = 9.8
h = height (m) # All of these values are scalars
KINETIC ENERGY
Kinetic energy – the energy an object has as a result of its motion
Ek = ½ mv2
m = mass (kg)
v = velocity (m.s-1)
MECHANICAL ENERGY
Mechanical energy – the sum of the gravitational potential energy and kinetic
energy at a point
Emech = Ep + Ek
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 Danetucker. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $8.87. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
82871 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now