"Haibao" is the mascot of the 2010 World Expo, and its image is shown in the picture. Among all kinds of "Haibao" dotted on the streets of Shanghai, there is a "Haibao" (uniform and solid) with a mass of 3.0 × 103kg, a density of 1.5 × 103kg / m3 and a contact area of 1m2 with the horizontal ground. Then "Haibao": ① the volume is______ The gravity is______ N. What is the pressure on the ground______ Pa．

"Haibao" is the mascot of the 2010 World Expo, and its image is shown in the picture. Among all kinds of "Haibao" dotted on the streets of Shanghai, there is a "Haibao" (uniform and solid) with a mass of 3.0 × 103kg, a density of 1.5 × 103kg / m3 and a contact area of 1m2 with the horizontal ground. Then "Haibao": ① the volume is______ The gravity is______ N. What is the pressure on the ground______ Pa．

① The volume of "Haibao" is v = m ρ = 3.0 × 103kg1.5 × 103kg / m3 = 2m3; the gravity of "Haibao" is g = mg = 3 × 103kg × 9.8n/kg = 2.94 × 104n; the pressure of "Haibao" on the ground is f = g = 2.94 × 104n; the pressure of "Haibao" on the ground is p = FS = 2.94 × 104n1m2 = 2.94 × 104pa