Simulink model does not work beginner

I am trying to do the following model in simulink but not able to solve the error. Please help. I am not able to attach the simulink model, so i am attaching the picture. New to this forum.

Answer 1

[Azzi Abdelmalek]

use this

[Rahul krishna]

Thank you very much, but it will help me a great deal if you can please tell why my model does not work.