i)A rocket is launched at an angle of 70.9 degrees from the horizontal from an altitude of 5.4m with a speed of 6.3m/s. Use energy methods to find its speed when its altitude is 2.7 m. I got a correct answer of 9.6234 m/s. I need help for the next part. ii)Find the y component of the velocity when the rocket's altitude is 2.7m. i dont quite what velocity i should use? i tried using the velocity i got for the first part but the answer is incorrect.