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.

Strategy
The force is equal to the weight supported, or

Transcribed Image Text:

F = mg (62.0 kg) (9.80 m/s²) = 607.6 N, 1.257 x 103 m². The equation AL = 1F YA and the cross-sectional area is ² = change in length. Lo can be used to find the