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.(adsbygoogle = window.adsbygoogle || []).push({});

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.

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Projectile motion using energy method

**Physics Forums | Science Articles, Homework Help, Discussion**