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24-07-2003, 05:17 PM | #1 | |||
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Legendary Senior Member
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a stress of 3.2MN m -2 is applied to a sample of material.
this requires a force of 80N. use the following formula to calculate the area over which that force acts. note MN m-2 is equal to N mm-2 so u dont need to do any unit conversions. you will need to rearrange the formula STRESS= FORCE/AREA. |
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24-07-2003, 08:55 PM | #2 | |||
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Cyber Warrior
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Area = Force / Stress
Area = 80N / 3.2 Nmm-2 Newton units cancel 1 over 1/a = a so units of answer are in mm^2 Numerical answer is therefore 25mm^2 or in conventional units as we were taught. 2.5 x 10^-5 m^2 |
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25-07-2003, 03:25 PM | #3 | |||
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Legendary Senior Member
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very good, very quick.
have you solved that one you left me before?? |
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25-07-2003, 05:46 PM | #4 | |||
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Cyber Warrior
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I was waiting for your solution to that one
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