1. (a) Consider a particle of mass m projected upward with a velocity Vo from theground (taken to be z=0). Starting from Newton's Law, and assuming that theonly forces acting on the particle are the gravitational force and a resistanceforce proportional to the magnitude of the velocity (acting in the oppositedirection, proportionality constant a), find how the velocity of the particlechanges with time. Analyze the behaviour of the particle.(b) Consider a particle falling in a long column of liquid starting from rest,subject to the same forces. How does the velocity of the particle change withtime? Analyze the behaviour of the particle.

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Answered: (a) Consider a particle of mass m…

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Please explain in detail An observer P stands on a train station platform as a high-speed train passes by at u/c = 0.8. The observer P, who measures the platform to be 60 m long, notices that the front and back ends of the train line up exactly with the ends of the platform at the same time. (a) How long does it take the train to pass P as he stands on the platform, as measured by his watch? (b) According to a rider T on the train, how long is the train? (c) According to a rider T on the train, what is the length of the train station platform?

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