JEE Main Physics question

Physics Laws of Motion JEE Main

A person is sitting in a travelling train and facing the engine. He tosses up a coin and the coin falls behind him. It can be concluded that the train is [SCRA 1994]

(A)Moving forward and gaining speedCorrect
(B)Moving forward and losing speed
(C)Moving forward with uniform speed
(D)Moving backward with uniform speed

Answer: (A)

Solution

While the coin is in the air, it keeps the horizontal velocity it had at the instant of the toss (equal to the train's speed at that moment). If the train were moving at constant velocity, the coin would land back exactly where it left (same horizontal

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Question ID VK-153392