Question

A girl of mass 50 kg is standing on pencil heels each of area of the cross-section 1cm square and an elephant of the mass 5000kg foot area 250cm square each standing on the floor.which one will exert more pressure and what is the difference between the pressure exerted by the girl and the elephant

Answer 1

the girl's pencil heels if all stuff mass etc. will equal to elephant..
because low surface area more pressure

Answer 2

Mass of girl = 50 kg = 50*10 = 500 N

Area of the heels 2*1 cm2 = 2cm2

Preassure exerted by the girl= 500N/2cm2

500*100*100/2

2500000 pa

Mass of the elephant 5000kg = 5000*10N

Area of feet=4*250cm2

= 4*250/100*100

Preassure exerted by elephant= 5000*10*100*100/4*250

=500000

The girl will exert more preassure than elephant by =(2500000-500000) = 2000000