1.A box sits on a platform by a compressed spring.The box hasa mass of 1kg.When

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1.A box sits on a platform by a compressed spring.The box hasa mass of 1kg.When the spring is released, it gives 4.9 J of energyto the box, and the box flies upward.What will be the maximumheight above the platform reached by the box before it begins tofall? 2. A ball of mass m rolls along a flat surface with aspeed of v1. It strikes a padded wall and bounces back in theopposite direction.The energy of the ball after striking the wallis half its initial energy. Ignoring friction, what equation givesthe ball's new speed as a function of its initial speed. 3. You drop a 6.0*10^-2 kg ball from a height of 1m above ahard,flat surface.The ball strikes the surface and loses .14 J ofits energy.It then bounces back upward. How much kinetic energydoes the ball have just after it bounces off the flatsurface? 1.A box sits on a platform by a compressed spring.The box hasa mass of 1kg.When the spring is released, it gives 4.9 J of energyto the box, and the box flies upward.What will be the maximumheight above the platform reached by the box before it begins tofall? 2. A ball of mass m rolls along a flat surface with aspeed of v1. It strikes a padded wall and bounces back in theopposite direction.The energy of the ball after striking the wallis half its initial energy. Ignoring friction, what equation givesthe ball's new speed as a function of its initial speed. 3. You drop a 6.0*10^-2 kg ball from a height of 1m above ahard,flat surface.The ball strikes the surface and loses .14 J ofits energy.It then bounces back upward. How much kinetic energydoes the ball have just after it bounces off the flatsurface?

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