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What will be stress in the unbalanced force situation
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[QUOTE="Ravi Singh choudhary, post: 5488185, member: 590137"] [b][color=blue]< Mentor Note -- thread moved to HH from the technical physics forums, so no HH Template is shown >[/color][/b] [ATTACH=full]101475[/ATTACH] [B]Problem Statement:[/B] Case 1: Mass is m; Cross sectional area is uniform A. What will be the stress in the middle section. Case 2: Bar is massless; What will be the stress in the middle section. Case 3: Bar is still assumed massless but 100F is increased to 500F; What will be the stress in the middle section. [B]Relevant equation: [/B]F/A; point is to find internal force in each situation. [B]My attempt to the solution: [/B]I found the acceleration simply by dividing "m" to the net force "99F". My poor understanding about stress was; it only acts when body in is zero unbalanced force. Simply we have to find the internal force at point which stress need to be calculated. But I realized even after there is unbalanced force situation we have internal force at particular section. So I solved for case I: a=(99F/m) After solving equation F1-F=(m/2)*a; I found the value of F1 i.e. (101/2)F stress will be F1/A. [ATTACH=full]101476[/ATTACH] But solution given was 99F/A i.e. stress due to original force configuration at middle section. For Case 2 and Case 3; I am clueless. [/QUOTE]
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What will be stress in the unbalanced force situation
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