Show that liquid in equilibrium of rest exerts normal force on the surface in contact with it.

The "______" exerted by a liquid at rest per unit area normal to the surface in contact with the liquid is called pressure.

The "______" exerted by a liquid at rest per unit area normal to the surface in contact with the liquid is called pressure.

Assertion: If an object is submerged in fluid at rest, the fluid exerts a force on its surface. Reason: The force exerted by the fluid at rest has to be parallel to the surface in contact with it.

Assertion: If an object is submerged in fluid at rest, the fluid exerts a force on its surface. Reason: The force exerted by the fluid at rest has to be parallel to the surface in contact with it.

A spherical ball of mass m =5kg rests between two planes which make angles of 30^(@) and 45^(@) respectively with the horizontal. The system is in equilibrium. Find the normal forces exerted on the ball by each of the planes. The planes are smooth.

Define thrust and pressure. Give their units. Show that when a liquid is in equilibrium, forces acting on the liquid must be perpendicular to its free surface.

What is fluid? Show that fluid exerts pressure and prove that the force acting on a fluid in equilibrium of rest have to be perdicular to its surface.