Calculate the change in length of the upper leg bone (the femur) when a 70.0 kg man supports 62.0 kg of his mass on it, assuming the bone to be equivalent to a uniform rod that is 40.0 cm long and 2.00 cm in radius. choose correct answers:
a.2×10⁵ m
b.3.1×10² mm
c.3.1×10⁵ m
d. 2×10² mm
