1.A compressional force of 5.40x10^4 N is applied to a bone specimen with a cros

Question

1.A compressional force of 5.40x10^4 N is applied to a bone specimen with a cross sectional area of 5.20x10^-4 m2. If the bone behaves elastically, what is the strain produced?

2. A ball is attached to an end of a 1m long light string, whose other end is held fixed. In these conditions, the period of oscillation is T. Later, a portion of the string is cut, and the period of oscillation in these new conditions has become (3/4)T. Find the final length of the string.

***PLEASE PLEASE show all of your work VERY CLEARLY! I have my final tomorrow and need so much help please! thank you!!!

Explanation / Answer

compressional force F = 5.40x104 N

cross sectional area A= 5.20x10-4 m2.

stress = F / A

          = 103.846 x10 6 N/ m2

the strain produced = Stress / Youngs modulus of bone

                             = (103.846 x10 6 N/ m2)/(70 x10 9 N/ m2)

                            = 1.483 x10 -3

If answer is wrong then you put young's modulus of bone in your textbook value

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