The Hebrides Macaque sleeps upside down, hanging off of tree
branches by its thick, strong tail. The body-length, mass, tail
length, and tail diameter (or 'thickness') is measured in a
population of these monkeys. The dimensions for a particular
juvenile specimen are as follows:
Body length: 35 cm
Mass: 13 kg
Unstrained tail length: 30 cm
Tail thickness: 3 cm
(a) Assuming that the tail is essentially
cylindrical and acts under tension as an elastic material with
Young's modulus 4.5××1066...