A0.16 kg billiard ball moving at 1.20 m/s collides elastically with one of the same mass at rest. it continues at a speed of 0.6 m/s afterward in a different direction from before. what is the final speed of the other billiard ball?
i thought it was .6 m/s because it is elastic, but it says i am wrong.

! 55 !  

write a paragraph or story to explain the transformation between potential and kinetic energy as shown in your picture or model.  

you should have at least 5 complete sentences with a main idea and supporting details.  

you must include the following words:  

potential energy

kinetic energy

mechanical energy

conservation of energy

dude, this is hard lol : ))