I in: Mechanical Oscillations - Angular freq, Energy of oscillating system

[Mason'sWorld]

Dear Collegues,
Can you help me to answer theese : Describe the mechanical energy of the oscillating system, with the special interest in the equilibrium and extreme positions.
And can u tell me please, that, what is angular frequency in this topic?

 

[janggeng]

for simpel pendulum
ω = root (g/L)
for spring
ω = root (k/m)

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http://janggeng.com/top-powerpoint-2011-tutorial/"

 

[Mason'sWorld]

Thanks for the help