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Distance vs Displacement

A person can ...

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A person can run on ground with a maximum speed of 6 m/s. The person stands on the rear end of roof atrain moving with constant velocity. The length of train is 120 m. The man begins to run at this maximum acapacity towards the front end, reaches the front end, immediately -turns back and run towards the rear end.Finci the net displacement of the man wir.t. ground by the time he reaches back to rear end. The velocity of train is 10 m/s 1)0 2) 400 m (3) 100 m (4)200 m

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