Laws of MotionHard
Question
The adjecent graph shows the extension (ᐃl)of a wire of length 1m suspendedfrom the top of a roof at one end with a load w connected to the other end if the corss-sectional area of the wire is 10-6m2, calculate the Young′s modulus of the materail of the wire
Options
A.2 × 1011N/m2
B.2 × 10-11N/m2
C.2 × 10-12N/m2
D.2 × 10-13N/m2
Solution
From the gaph l = 10-4 m, F = 20 N
A = 10-6m2, L = lm
∴ y =
20 × 1010 = 2 × 1011N/m2
A = 10-6m2, L = lm
∴ y =
20 × 1010 = 2 × 1011N/m2
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