2007-02-19 18:57:19 · 2 answers · asked by clara y 1 in Science & Mathematics ➔ Physics
This is a common misconception. The jet does NOT push the baloon; it just no longer has a surface to make a counterbalancing force to keep the baloon from moving.
Without the opening the balloon does not move because the internal pressure is the same in all direction. With the open hole, a wall section is missing while the opposite wall section stay put. The internal pressure thus causes a non-zero net force pushing on the wall section opposing the open section. The jet stream does not push the balloon. This pushing force is always there well before the opening; just the counteracting force becomes missing because of the missing wall section.
2007-02-19 19:24:40 · answer #1 · answered by sciquest 4 · 0⤊ 0⤋
the balloon squeezes the air out and that pushes the balloon forward from the jet of compressed air.
2007-02-20 03:01:39 · answer #2 · answered by niobiumboy 2 · 1⤊ 0⤋