5.4 Harder questions on Pressure

5.4 Harder questions on Pressure

07 October 2011

16:30
· Collins, p.107, Q.4.

[cid:image001.png@01CC88E3.D010D6E0]

ANSWER

Shoe heel:

p = F / A

p = 400 / (0.05 x 0.05)

p = 160 000N / m2

Elephant:

p = F / A

p = 5000 / (pi x 0.1^2)

p = 159 155 N / cm2

High-heel shoe:

p = F / A

p = 400 / (1/20000)

p = 8 000 000 N / m2

Which ones will damage a floor that yields at a pressure of 4000 kPa?
High - heel shoe ONLY