JEE Main Physics question

Statement 1: The bridges are declared unsafe after long use.

Statement 2: The bridges lose their elastic strength with time.

(A)Assertion is True, Reason is True; Reason is correct explanation for AssertionCorrect
(B)Assertion is True, Reason is True; Reason is not correct explanation for Assertion
(C)Assertion is True, Reason is False
(D)Assertion is False, Reason is True

Answer: (A)

Solution

Repeated alternating stresses from traffic over a long period cause fatigue, so a bridge gradually loses its elastic strength with time

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Question ID VK-154990