Question

Для некоторого материала предел пропорциональности составляет σп = 49 МПа. Определите силу упругости, соответствующую этому пределу, для шнура сечением S = 30,0 мм2, изготовленного из такого материала. Ответ выразите в ньютонах и округлите до двух значащих цифр (например: 0.019; 250; 1400).

Answer 1

Ответ:

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Answer 2

Calculation of Elastic Force

To determine the elastic force corresponding to a given yield strength, we can use the formula:

Elastic Force = Yield Strength × Cross-sectional Area

Given: - Yield strength (σп) = 49 MPa - Cross-sectional area (S) = 30.0 mm²

To calculate the elastic force, we need to convert the cross-sectional area from mm² to m². Since 1 mm² = 1 × 10^(-6) m², the cross-sectional area in m² is:

S = 30.0 × 10^(-6) m²

Now, we can substitute the values into the formula to calculate the elastic force:

Elastic Force = 49 MPa × 30.0 × 10^(-6) m²

Calculating this expression gives us the elastic force in newtons (N). Let's perform the calculation:

Elastic Force = 49 × 30.0 × 10^(-6) N

Elastic Force = 1.47 × 10^(-3) N

Therefore, the elastic force corresponding to the given yield strength and cross-sectional area is approximately 0.00147 N (rounded to two significant figures).

Please note that the sources provided do not contain specific information related to this calculation.