A ball is thrown up into the air at the velocity of 50ft/s. After t seconds, the distance of the ball is 50t - 16t^2. What is the velocity of the ball after the balll hits the ground

if a star is moving toward earth, its light waves appear to be squeezed together. hope it

! 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 : ))

b.

hope this : )