Machine Design
In the case of an elastic bar fixed at upper end and loaded by a falling weight at lower end, the shock load produced can be decreased by

Increasing the cross-section area of bar
Would depend upon other factors
Remain unaffected with cross-section area
Decreasing the cross-section area of bar

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Machine Design
Plastic flow in ductile materials

Has no effect on it
Lessens the seriousness of static loading stress concentration
Increases the seriousness of static loading stress concentration
Depends on other considerations

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