1. The problem statement, all variables and given/known data Fleas have remarkable jumping ability. If a 0.50 mg flea jumps straight up, it will reach a height of 36 cm if there is no air resistance. In reality, air resistance limits the height to 18 cm. 2. Relevant equations K=1/2 m*v^2 3. The attempt at a solution I tried to use kinematics to get a delta T, and the program is still saying im wrong! The final is tomorrow and this is a practice problem, can someone please explain how to do this! thanks!