Simulink Problem in differential equation 1

Your equation is fundamentally incorrect. The units on both sides are not equal. Fix your equation, then try to create a Simulink model. If you have trouble, ask about the new model.

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I am sorry the right equation is
alpha = omwga^2 / setta
The block diagram

but how to get values of omega and alpha when setta changes form 0 to 90

image in better resolution

?!!

?? you show setta as the integral of omega, so there is not "setting" of setta. You've created a complete, self-contained, closed loop, You could possibly add a multiplier or sum box to inject a signal, but it wouldn't be setta, per se.

TTFN
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thnx you right i just did the initial conditions of setta and omega and it works