Answer:
Very high pressure on your foot.
Explanation:
Now let's say this lady who stepped on your foot is 70 kg. The force she exerts is her weight which is about 700 N.
Now, if those 700 N are spread over a larger surface area, as in flat shoes, the pressure she'll exert on your foot will be much less than if her 700 N were concentrated on the tiny heel's surface area.
According to the formula,
P= F/A; where P is pressure in Pa, F is the force in N and A is the surface area in metre square;
Pressure is inversely proportional to area. The smaller the area the higher the pressure exerted. And that's the case with the heel.
