A weight of 10kN falls by 30mm on a collar rigidly attached to a vertical bar 4m long and 1000mm2 in section. What will be the instantaneous stress (E=210GPa)?

A weight of 10kN falls by 30mm on a collar rigidly attached to a vert

1.	A weight of 10kN falls by 30mm on a collar rigidly attached to a vertical bar 4m long and 1000mm2 in section. What will be the instantaneous stress (E=210GPa)?
A.	149.4 N/mm2
B.	179.24 N/mm2
C.	187.7 N/mm2
D.	156.1 N/mm2
Answer» D. 156.1 N/mm2

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A weight of 10kN falls by 30mm on a collar rigidly attached to a vertical bar 4m long and 1000mm2 in section. What will be the instantaneous stress (E=210GPa)?

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