Final answer:
Lateral pressure refers to the pressure exerted by a fluid or a solid on its surroundings in a sideways or perpendicular direction. A demonstration activity can involve filling a plastic bottle with water and observing the lateral pressure as it flows out of small holes on the sides of the bottle.
Step-by-step explanation:
Lateral pressure refers to the pressure exerted by a fluid or a solid on its surroundings in a sideways or perpendicular direction. It is the result of shear forces acting on an object. For example, when you push a book against a wall, the lateral pressure is the force exerted by the book on the wall. To demonstrate lateral pressure, you can fill a plastic bottle with water and place it on its side. Then, poke small holes on the sides of the bottle. As the water flows out of the holes, you can observe the sideways or lateral pressure exerted by the water.