此题数据不规范（1）79应为79N;(2)根据P=F/s 可求压强,m =79N/10N/kg= 7.9 kgV =m/p = 7.9 kg/7.9×10³ kg/m³ =0.001m³ S =0.01m²P=79N/0.01m²=7.9×10³ Pa