I got homework pressure! help!?

so i know that the pressure formula is Pressure (Pa)= Force (N) over Area (m2). but these questions are killing me!





1.An elelphant that weighs 40,000 N stands on one leg . The area on the bottom of the elephant's foot is 0.4 m2. How much pressure is exerted on the elephant's foot?





2. A carpenter hammers a nail with a force of 45 N with every stroke. The head of the nail has a surface area of 0.002 m2. How much pressure is exerted on the nailhead with each stroke?





3. a brick falls from the third floor of a construction site. The brick hits the ground on its end, which measures 0.15 m by 0.25 m, with a force of 30 N. How much pressure is exerted by the brick on the gound? (are of rectangle =width x length)Thankss

I got homework pressure! help!?
1. P = F / A


F = 40000 N


A = 0.4 m^2


P = 40 000/0.4 (N/m^2)


= 100 000 N/m^2





2. P = F / A


F = 45 N


A = 0.002 m^2


P = 45/0.002 (N/m^2)


= 22 500 N/m^2





3. P = F / A


F = 30 N


A = L * W = (0.15 m) * (0.25 m)


= 0.0375 m^2


P = 30/0.0375 (N/m^2)


= 800 N/m^2