posted by Hannah .
A golfer hits a shot to a green that is elevated 3.0 m above the point where the ball is struck. The ball leaves the club at a speed of 17.4 m/s at an angle of 35.0¢ª above the horizontal. It rises to its maximum height and then falls down to the green. Ignoring air resistance, find the speed of the ball just before it lands.
I was going to do vx= 17.4 cos 35
vy=(17.4 sin 35) - 9.8(?)
and then do sqrt vx^2 + vy^2 but I wasn't sure if the vy equation was correct?