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## Homework Statement

hi i'm trying to design a small experiment based on soil pressure

i've not had much use of some of the equations and principles for a few years so i'm a little rusty

basicly i'm trying to exert pressures onto grass seeds (lolium perenne) in a rough field experiment in order to see how it affects germination rates

effective material

small flat plate 0.25m*0.25m for this purpose it is effectively massless

me approx mass 100kg

i can exert approx 15-16kPa by standing on the plate

but i'm trying to calculate how high i need to jump to exert around 30kPa

looking for a max pressure

i'd assume soil compression to be about 2 cm from surface height

i don't need high precision but a rough and ready approximation

ignore any mitigation by the body i.e knees and ankles

any help gratefully received

## Homework Equations

mass m = 100kg

grav = g = 9.8m/s^2

area = a = 0.0625m^2