Calculate the pressure exerted on the heel of a boy’s foot if the boy weighs 80 n and he lands on one heel, which has an area of 16 cm2.

Pressure at a given surface is given as ratio of normal force and area

so here force due to heel of the shoes is given as 80 N

and the area of the heel is given as 16 cm^2

so we can say

here we have

F = 80 N

so pressure at the surface due to its heel will be 5 * 10^4 N/m^2

electric field is a function of 1/r^2

yes, the force per unit charge for a point charge is inverse square law.