Define pressure. Give its SI unit.
The total force applied per unit area is called pressure.
Mathematically,
Pressure (P) = Force (F) / Area (A)
Its SI unit is pascal (Pa).
What is upthrust? Give its SI unit and CGS unit.
The resultant upward thrust exerted by a fluid is called upthrust.
Its SI unit is kgm/s2 and CGS unit is gmcm/s2.