Passenger of a train just drops a stone from it. The train was moving with constant velocity. What is path of the stone as observed by (a) the passenger itself, (b) a man standing on ground?
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Answer:Path according to the passenger is a straight line.
Path according to a man standing on ground is parabolic.
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The relative motion with respect to the passenger is in vertical direction and the motion with respect to man standing on ground is projectile motion.
Explanation:
(a) Horizontal component of velocities of passenger and stone are same. Therefore relative velocity in horizontal direction is zero. Hence the relative motion is only in vertical direction.
(b) With respect to the man, stone has both velocity components, horizontal and vertical. Therefore path of the stone is a projectile.
Hence the relative motion with respect to the passenger is in vertical direction and the motion with respect to man standing on ground is projectile motion.
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