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12.3 spring pendulum with block moving in slot<br />
<br />
r<br />
<br />
y<br />
y<br />
r<br />
System. Pendulum with blob which<br />
moves in slot perpendicular to axis. In<br />
addition, length of the axis of pendulum<br />
itself changes in time. y and r are<br />
measured from static equilibrium of<br />
springs<br />
y<br />
Velocity diagram<br />
r<br />
2y <br />
r 2<br />
2r<br />
<br />
y<br />
ÿ<br />
r<br />
acceleration diagram<br />
y 2<br />
r<br />
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