Question 155: Properties of Matter

Question

The elastic limit of brass is 379 MPa. What should be the minimum diameter of a brass rod if it is to support
a 400 N load without exceeding its elastic limit?

Accepted Answer

$${{400} \over {{\pi  \over 4}{d^2}}} = 379 	imes {10^6}$$
$${d^2} = {{4 	imes 400 	imes {{10}^{ - 6}}} \over {\pi  	imes 379}} = 0.336 	imes {10^{ - 6}} 	imes 4$$
$$d = 2\sqrt {0.336}  	imes {10^{ - 3}}M  \simeq  1.16\,mm$$

Answer

1.16 mm

Answer

1.36 mm

Answer

1.00 mm

Answer

0.90 mm

Properties of Matter

The elastic limit of brass is 379 MPa. What should be the minimum diameter of a brass rod if it is to support a 400 N load without exceeding its elastic limit?

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