Question

Give reasons for the following : it is easy to walk on sand with flat shoes then with high heel shoes

Answer 1

the reason for this is pressure is indirectly proportional to area 
thus the area of a flat shoe is more when compared to a flat heel and so pressure applied by a flat shoe is much less than the pressure applied by a heel . this makes it easier for us to walk on sand with flat shoes 

Answer 2

It is because in case of flat shoes, area of contact is larger than area of contact of on sand and hence they do not high heel shoes. Thus flat shoes exerts less pressure sink in the sand but high heel shoes do sink.

Hope this will help you :-)