posted by evan on .
stephanie serves a volleyball from a height of .8m and gives it an initial velocity of 7.6m/s straight up. how high will it go? how long will it take to reach maximum height?
YOu can use energy relationships.
Initial energy= final PE
mg*.8+ 1/2 m 7.6^2=mgh
solve for final h.
How long? how long does it take to fall back?
hf=hi-1/2 g t^2
.8=h-4.9 t^2 solve for t, using h above.