Homework Help: PHysics

Posted by Vladimir on Saturday, July 28, 2012 at 7:33pm.

What is the total energy of a 15-kg mass attached to a spring oscillating horizontally with an amplitude of 20 cm and an angular frequency of 32 rad/s?

PHysics - ajayb, Sunday, July 29, 2012 at 8:13am
w^2 = k/m =>
k = m*w^2
=15*32^2
=15,360 n/m
E =(1/2)k*A^2
=(1/2)*15360*(.20)^2
=307 J

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