IGCSE/GCSE/O & A Level/IB/University Student Forum

Qualification => GCE AS & A2 Level => Queries => Topic started by: Lucifers Angel on October 20, 2009, 08:37:48 am

Title: Work - energy formulas for M1
Post by: Lucifers Angel on October 20, 2009, 08:37:48 am

Can anyone mention some of the work-energy formulas used in M1 - CIE AS Level.
I know of some of them:

work done = change in kinetic energy + work done against resistance
loss in GPE - gain in kinetic energy = work done against resistance

But I've seen some work-energy formulas in the marking schemes that I'd never come across, such as:

total work done = gain in GPE + work done against resistance
gain in GPE = work done by driving force + loss in KE - work done against resistances
total work done = loss in GPE - gain in KE

Can anyone explain these to me, and please let me know about any further variations of these.

Thanks loads!

Title: Re: Work - energy formulas for M1
Post by: astarmathsandphysics on October 20, 2009, 08:55:56 am

Too many formulae. Start thinking about principles.
All those folrmulae you mentioned are different versions of the principles of conservation of energy,