If there happens to be a little heap of gunpowder lying on the table where the ball hits it, it may bounce back with a faster speed than it had immediately before collision. If the collision is somewh...If there happens to be a little heap of gunpowder lying on the table where the ball hits it, it may bounce back with a faster speed than it had immediately before collision. If the collision is somewhat inelastic it will then rise to a height h1=e2h0 and it will take a time et to reach height h1.
