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26 Nov 2019
1.A box sits on a platform by a compressed spring.The box hasamass of 1kg.When the spring is released, it gives 4.9 J of energytothe box, and the box flies upward.What will be the maximumheightabove the platform reached by the box before it beginstofall? 2. A ball of mass m rolls along a flat surface withaspeed of v1. It strikes a padded wall and bounces back intheopposite direction.The energy of the ball after striking thewallis half its initial energy. Ignoring friction, what equationgivesthe 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 aboveahard,flat surface.The ball strikes the surface and loses .14 Jofits energy.It then bounces back upward. How much kineticenergydoes the ball have just after it bounces off theflatsurface?
1.A box sits on a platform by a compressed spring.The box hasamass of 1kg.When the spring is released, it gives 4.9 J of energytothe box, and the box flies upward.What will be the maximumheightabove the platform reached by the box before it beginstofall?
2. A ball of mass m rolls along a flat surface withaspeed of v1. It strikes a padded wall and bounces back intheopposite direction.The energy of the ball after striking thewallis half its initial energy. Ignoring friction, what equationgivesthe 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 aboveahard,flat surface.The ball strikes the surface and loses .14 Jofits energy.It then bounces back upward. How much kineticenergydoes the ball have just after it bounces off theflatsurface?
Tod ThielLv2
7 Aug 2019
