1、由p=m/v得v=m/p=2kg/1000kg/m3=0.002m3
2、p=f/s=2kg*10n/kg+5n/0.01m2=2500p
3、p=f/s=pvg/s=0.8*103*3*10-3m3*10n/kg/0.01m2=800*0.03/0.01m2=2400p
1、由p=m/v得v=m/p=2kg/1000kg/m3=0.002m3
2、p=f/s=2kg*10n/kg+5n/0.01m2=2500p
3、p=f/s=pvg/s=0.8*103*3*10-3m3*10n/kg/0.01m2=800*0.03/0.01m2=2400p