Momentum and CollisionHard
Question
A copper wire of length 3m and area of cross -section 1 mm2, passes through an arrangement of two frictionless pulleys, P1 and P2. One end of the wire is rigidly clamped and a mass of 1 kg is hanged from the other end. If the Young′s modulus for copper is 10 × 1010 N/m2, then the elongation in the wire is -
Options
A.0.05 mm
B.0.1 mm
C.0.2 mm
D.0.3 mm
Solution
Tension in wire = mg = 10N
so elongation
= 0.3 mm
so elongation
= 0.3 mmCreate a free account to view solution
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