Photographic elephant

Solution: F=G image =m image g = 2×103kg×10n/kg = 2×104n,

S=2500cm 2 =0.25m 2，

P image = = = 8× 104 Pa。

F =500N，S = 20cm2× 2 = 40cm2 = 4× 10 ~ 3m2，

P people = =1.25×105pa,

Because P people are better than P elephants, people leave deeper footprints in the sand than elephants.