# Homework Help: Dynamics Question

1. Jan 13, 2006

### DaRotot

The flat disc rotates around the vertical axis through O a 240rpm (8pi rad/s). each block of 05kg starts of from the spring equilibrium poisition of x = 0.025m. Each spring has stiffness of 400 N/m. Determin the value x and the normal force N of the slot wall on the block. Neglect friction and mass of the springs.
So far I have.
$$\sum$$F(t) = 0 = Tsin$$\theta$$ - Ncos $$\theta$$
$$\sum$$F(n) = Tcos$$\theta$$ + Nsin$$\theta$$ = m.r.$$\omega^2$$
$$\sum$$F(y) = N = ma(y) = m.a.sin $$\theta$$
$$\sum$$F(n) = T = k(x -0.025)
r = $$\sqrt {0.08^2 + x^2}$$
My brain has pretty much rotted out on this occassion. Thanks

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Last edited: Jan 13, 2006