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Why must the open end of the balloon face backwards if you want the car to move forward?
Wiki User
∙ 6y ago
Because of Newton's law. This states that every action must have an equal and opposite reaction.
Thus facing the balloon backwards when attached to the car and letting the air out causes the air mass in the balloon to be expelled BACKWARDS. The law then says that the car must be pushed FORWARDS with an equal force.
This is how a space rocket works.
Wiki User
∙ 6y ago
The open end of the balloon must face backwards because when air is released from the balloon, it creates propulsion in the opposite direction, which propels the car forward. If the open end of the balloon faced forward, the expelled air would create propulsion in the wrong direction, causing the car to move backward.
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