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Author Topic: Mechanics  (Read 768 times)

Offline yasser37

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Mechanics
« on: May 17, 2010, 08:13:45 pm »
Hi guys

I have 1 problem in Mechanics

The energies.

can someone kindly post all equations used for Energies and Work

such WD = KE + PE + Energy Lost

and so on

thanks
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Offline ifraha18

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Re: Mechanics
« Reply #1 on: May 17, 2010, 08:15:00 pm »
work done(driving force)_work done(resistive force)=change in mechnical energy
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Offline [Spy]

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Re: Mechanics
« Reply #2 on: May 17, 2010, 08:19:07 pm »
YES PLEAAAAAAAAAAAAAAAAASSSSSSSSSSSSSSSSSSSSSSSSSSEEEEEEEEEEEEEEEEEEE

:d
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Offline zxcvbnm

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Re: Mechanics
« Reply #3 on: May 17, 2010, 08:25:54 pm »
work done by driving force= p.e+k.e+ work done against resistive forces
remember that work done by resistive forces will always be taken positive, while p.e and k.e can also be negative depending on whether they increase or decrease
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Offline ifraha18

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Re: Mechanics
« Reply #4 on: May 17, 2010, 08:29:37 pm »
jst rem work by driving force _wrk by resistive force=chnge in mchnical energy

chnge in mchnical is gain in PE - loss in Ke
or viceversa

and power=driving force * velocity
so driving force incase power is given =power/v
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