Two students measured the length of their desk each using a different meter stick. One student reported a length of 18 cm and th
e other reported a length of 82cm. What is the most likely explanation for the difference?
1 answer:
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Answer:
Knowing we only have one load applied in just one direction we have to use the Hooke's law for one dimension
ex = бx/E
бx = Fx/A = Fx/π
Using both equation and solving for the modulus of elasticity E
E = бx/ex = Fx / πex
E =
Apply the Hooke's law for either y or z direction (circle will change in every direction) we can find the change in radius
ey = (бy - v (бx + бz)) =
бx
= =
Finally
ey = Δr / r
Δr = ey * r = 10 *
Δd = 2Δr =
Explanation: