# Work kinetic energy

Please see the attachments.

Power= mom*ang vel. Please use work kinetic energy concepts.

https://brainmass.com/physics/work/work-kinetic-energy-16832

#### Solution Preview

By energy law,

Initial mechanical energy = final mechanical energy

Initial energy

= potential enrgy of spring (PESi)

+ gravitational potential energy of rod (PERi) (reference is B)

Final energy

= potential energy of spring(PESf)

+ rotational kinetic energy of rod (RKERf)

Because, natural length of spring,

lo = 225 mm

initial length of spring,

li = ...

#### Solution Summary

This solution uses energy law to find angular velocity. It's provided in 590 words and includes an attached .jpg image to enhance understanding.

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