Question

Explain science activity 9.5 of force and laws of motion - NCERT class 9

Answer 1

Answer:

In activity 9.5 we saw the newton’s second law of motion by the movement of the cart. Here also similar thing happens. Here the elastic energy of the balloon pushes the balloon forward and air moves out in the opposite direction as per the second law. As a result, the balloon moves forward. Since the balloon is tied with the straw on the string, the balloon moves only in the direction of string,

Explanation:

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Answer 2

The activity 9.5 of force and laws of motion - NCERT is based on Newton's second law of motion.

• According to Newton's second law of motion, F = ma
• where, F = force, m = mass of the object, a = acceleration of the object
• The elastic energy of the balloon pushes the balloon forward and the air present inside of the balloon gets released in the opposite direction.
• The balloon moves from one end to another end in the same direction of the string.