A 19

cm

long tendon was found to stretch 4.5

mm

by a force of 11.3

N

. The tendon was approximately round with an average diameter of 8.2

mm

.


Calculate the Young's modulus of this tendon.

Respuesta :

Answer:

Young's modulus of this tendon is [tex]9.03\times 10^6\ N/m^2[/tex].

Explanation:

Given that,

Length of the tendon, l = 19 cm

It is stretched by 4.5 mm, [tex]\Delta l=4.5\ mm[/tex]

Force, F = 11.3 N

Average diameter, d = 8.2 mm

Radius, r = 4.1 mm

The formula of Young's modulus of this tendon is given by :

[tex]Y=\dfrac{Fl}{\Delta l A}\\\\Y=\dfrac{11.3\times 0.19}{4.5\times 10^{-3}\times \pi (4.1\times 10^{-3})^2}\\\\Y=9.03\times 10^6\ N/m^2[/tex]

So, the Young's modulus of this tendon is [tex]9.03\times 10^6\ N/m^2[/tex]. Hence, this is the required solution.