Robot starts to overturn when reaching to pick up a load

Thread starter crystallizedyogurt
Start date Sep 10, 2024
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Ap physics (mechanics) Physics 1 Torque

AI Thread Summary

The discussion centers on calculating the moment of a robot arm when it reaches to pick up a load, with specific equations provided for the moments of the robot, arm, and load. The calculations yield an incorrect distance of 1.09 feet instead of the expected 1.82 feet, prompting questions about the interpretation of the moment at point A and the significance of the "100" in the equation. Participants seek clarification on the terms used and the overall approach to solving the problem. The conversation highlights the complexity of moment calculations in robotics and the need for precise definitions in physics problems. Understanding these nuances is crucial for accurate problem-solving in engineering contexts.

Sep 10, 2024

crystallizedyogurt

Homework Statement: The robot has an extendable arm that weighs 25 lb and picks up a 125-lb load at point B. If the robot starts to overturn when the moment at point A is 100 ft*lb, how far out (x) can the are extend

Relevant Equations: M = Force * Arm

M robot = (125-25)lb* 1 ft = 25 lb*ft
M arm = 25 lb * (x/2 -1 )
M load = 125 lb * (x-1)
Mtotal =. 100 + 12.5 x -25 + 125 x -125 = 100
X = 1.09 ft
but the correct answer is 1.82 feet, why?

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Sep 10, 2024

haruspex

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crystallizedyogurt said:

Mtotal =. 100 + 12.5 x -25 + 125 x -125 = 100

What is the "100" on the left?
What, exactly, do you think is intended by "the moment at point A" in the question?

Sep 11, 2024

Lnewqban

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Welcome, @crystallizedyogurt !

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