003-047 What is the pressure force on the block axis?

Physics problem (Playlist 003 Newton's laws, momentum):
Bars with masses m1 = 0.2 kg, m2 = 0.3 kg are connected by a thread thrown over a light stationary block.
What is the force of pressure on the block axis?
Determine the acceleration of the system and the tension in the thread.
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TIME CODE (VIDEO CONTENTS 003-047)
00:00 - Problem condition
00:15 - Explanation and solution