Fleas have remarkable jumping ability. A 0.45 mg flea, jumpingstraight up, would reach a height of 30 cm if there were no airresistance. In reality, air resistance limits the height to 20 cm.

Part A What is the flea's kinetic energy as it leaves theground?

Part B At its highest point, what fraction of the initialkinetic energy has been converted to potential energy? Express youranswer using two significant figures.