Force & Motion: Find Max Weight of Block A for Stationary System

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To determine the maximum weight of block A for a stationary system, start by analyzing the forces acting on block B, which weighs 711 N. The static friction force can be calculated using the coefficient of static friction (0.25) and the normal force. A free body diagram is essential to visualize the forces, including the tension in the cord and the weight of block A, which affects the force pulling block B off the table. Understanding the relationship between these forces will help in calculating the maximum weight of block A that keeps the system stationary. Properly applying Newton's laws will yield the necessary solution for the physics problem.
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Hi, iam new here and would like some help with my high school physics. i would like to know the steps (and explanations), not just the answer. since i need to do good on the tests.

Block B weighs 711 N. the coefficient of static frcition between block and the table is 0.25; assume that the cord between B and the knot is horizontal. Find the maximum weight of block A for which the system will be staionary.
.../|(wall)
...../..|
.../...|
(B)----o(30degrees)
____...|
table|..|
...(A)
(ignore the periods)
 
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You are supposed to show what you've tried:
https://www.physicsforums.com/showthread.php?t=28

Draw a free body diagram.
What is the force pulling B off the table? How is this force affected by A's weight?
 

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