Homework Help: Physics 1

Posted by Johnvon on Wednesday, December 5, 2012 at 8:35pm.

Consider a simple pendulum of length 1.1 m with
m = 2.9 kg.
If the amplitude of the oscillation is 0.11 m (as measured along the circular arc along which it moves), what is the total mechanical energy of the oscillator?
____ Joules

Physics 1 - Jennifer, Friday, December 7, 2012 at 5:19pm
When all the mechanical energy is kinetic energy, the energy is

1/2*m*v^2 = 1/2*m*omega^2*r^2

where m is the mass, r is the radius, and omega is the angular velocity; For a pendulum, the angular velocity is given by omega = (g/r)^0.5

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