What pressure is exerted by the tip a nail struck with a Force of 20,000N? Assume the tip is a 1.5mm-radius circle.

Answer 1

r = 1.5 * 10^-3 m
pi r^2 = pi (2.25) * 10^-6 m^2
F/A = P = 2*10^4 /[pi (2.25) *10^-6) ]
= .283 *10^10
= 2.83 * 10*9 Pascals