For a liquid element at rest the forces acting on It are a G

For a liquid element at rest, the forces acting on It are: a) Gravity, shear and normal forces b) Pressure and shear forces c) Gravity and shear forces d) Gravity and normal forces

Solution

D. At rest, the forces acting on a fluid element are only gravity and compressive (normal ) stress.

A static fluid can have no shearing force acting on it

Any force between the fluid and the boundary must be acting at right angles to the boundary.

The relative weaker bonds in a fluid make it impossible for the fluid to resist any shear stresses. This ensures that the pressure at any point in a fluid is same in all the directions.