1) A bullet fired from a gun is more dangerous than an air molecule hitting a person, though both bullet and air molecule are moving with same velocity. Explain.
2) Why are road accidents at high speeds very much worse than accidents at low speeds?
3) What was misbelief about the theory of motion before Newtonian motion theory? Why was it overruled?
Answers
Answer:
1. Mass of a bullet is much greater than the mass of an air molecule. Therefore, even when both have almost the same speed, linear momentum of bullet is much larger than the linear momentum of an air molecule. ... That is why a bullet fired from a gun is more dangerous than an air molecule.
2. The road accidents at high speeds involve much larger changes in momentum in much smaller time. Therefore, forces developed are very large resulting in a disaster.
3. Laws of science was different for heaven (space) and earth.It was overruled because Galileo showed with inclined plane experiments that bodies move without needing constant force. The misbelieve's before Galileo (not Newton) were due to Aristotle, were.
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