Questions asked by Madiha

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• A man is sitting in a train in motion and faces the engine.He tosses a coin ,the coin falls BEHIND him.......explain...? And a particle with negative acceleration is speeding in SHM?..
  
• If a ball is initially dropped from height h and has coefficient of restitution 0.9 .How many bounced will the ball make before comping to rest? Please help...