An object placed in a moving fluid experiences a net force when the speed of the fluid is greater on one side of the object than on the other. This is due to a difference in pressure on the two sides of the object and is known as the Bernoulli effect. A number of demonstrations of this Bernoulli effect have appeared in the physics teaching literature. In this article, we describe two such demonstrations that are quite dramatic and suitable for showing to large classes.
展开▼