|Dec6-12, 06:57 PM||#18|
Work and Energy
I am just realizing that we have a sign error here, perhaps this was the source of your confusion.
It should be 1/2mv^2 + mgh = constant right? Sorry I did not notice this before.
|Dec6-12, 06:59 PM||#19|
thanks so much for your all your help and time!
|Dec6-12, 07:03 PM||#20|
Consider a pendulum swinging back and forth with no air resistance or friction.
At the top of the swing:
PE = Maximum = mghmax where h is measured from the bottom of the swing
KE = Zero because it stops momentarily
At the bottom of the swing:
PE = Zero
KE = Maximium (= 0.5mV^2)
At any point in between:
PE + KE = Constant = mghmax
|Dec6-12, 09:20 PM||#21|
Went back and corrected sign error in my posts (don't want to confuse anyone coming along later).
Can't believe I can post so many times and not notice this, what I get for being half asleep I guess
|kinetic energy, potential energy|
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