Wax image quality: m wax = ρ wax v = 0.9×103kg/m3× 0.14m3 =126kg.
(2) gravity of wax figure: g wax =m wax g =126kg×10n/kg =1260n,
Pressure of wax figure on the ground: P=FS=G wax S= 1260N3.2× 10? 2m2≈4× 104Pa。
(3) Work done by gravity: W=G person h=m person GH =140kg×10n/kg× 0.35m = 490J.. .
Answer: (1) The mass of Yao Ming wax figure is about 126kg. ..
(2) The pressure of wax figure on the ground is 4× 104 Pa.
(3) During his fall, gravity did 490J work.