Steel ruptures when a shear of3.5xx10^(8...

Steel ruptures when a shear of`3.5xx10^(8)Nm^(-2)` is applied. The force needed to punch a `1 cm` diameter hole in a steel sheet `0.3 cm` thick is nearly:

`1.4xx10^(4) N`

`2.7xx10^(4) N`

`3.3xx10^(4) N`

`1.1xx10^(4) N`

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