# Cross sectional area

by kiwikahuna
Tags: cross, sectional
 P: 61 1. The problem statement, all variables and given/known data I'm working on a problem that is asking me to find Young's Modulus. I have the right formula and everything that I need but I can't seem to figure out how to find the cross sectional area of a nylon rope. The rope is 21 m long and 1.4 cm in diameter. 2. Relevant equations 3. The attempt at a solution Would the cross sectional area be the area: pi(0.7)^2
Mentor
P: 40,883
 Quote by kiwikahuna Would the cross sectional area be the area: pi(0.7)^2
Assuming that it has a circular cross-section (a reasonable assumption), then the area would be that of a circle ($\pi r^2$). But be sure to use standard units for the radius.
HW Helper
P: 2,886
 Quote by kiwikahuna 1. The problem statement, all variables and given/known data I'm working on a problem that is asking me to find Young's Modulus. I have the right formula and everything that I need but I can't seem to figure out how to find the cross sectional area of a nylon rope. The rope is 21 m long and 1.4 cm in diameter. 2. Relevant equations 3. The attempt at a solution Would the cross sectional area be the area: pi(0.7)^2

yes (but be careful witt the units. This will be in cm^2. You might need to put it in m^2)

EDIT: Doc Al beat me to it :-)

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