ap-board-class-9 · physical-science
Practice — Motion
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⏱ 05:00
A train starts from rest and accelerates uniformly at 0.5 m/s². After 20 seconds, the brakes are applied and it decelerates uniformly, stopping in 400 m. Find: (i) velocity just before braking, (ii) deceleration during braking, (iii) total time of journey.
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