Question

The 2 thigh bones (femurs), each of cross-sectional area 10 cm² support the upper part of the body of mass 40 kg . Estimate the avg. pressure sustained by the femers.

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Answer 1

Answer:

Given, mass of body, m=40kg;g=10ms

−2

;

area, A=2× area of each thigh bone

=2×10cm

2

=20×10

−4

m

2

(weight of the body is supported by two thigh bones)

Force, F= weight of the body =mg=40×10

=400N

Pressure, P=

Area

Force

=

A

F

=

20×10

−4

400

=2×10

5

Pa

Explanation:

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