what will happen if u toss a coin in a running train
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fall in front
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fall in back
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fall in same place
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none of the above
When you toss a coin in a running train, it falls in the same place due to inertia. The coin shares the train's horizontal velocity when tossed, so it continues moving forward at the same speed as the train while in the air.
A coin tossed straight up inside a smoothly moving train falls back to the same place relative to the thrower, because the coin already shares the train's horizontal velocity before it's tossed. Since the train (assuming constant speed, no acceleration) provides an inertial frame, the coin's horizontal motion matches the train's the entire time it's in the air. This is a classic illustration of Newton's first law/relativity of motion in a uniformly moving reference frame.