You are on a new planet and want to know the acceleration due to gravity. You take a ball and kick it at an angle of 18.0° at a speed of 22.1 m/s. If the ball is in the air for 7.40 s, what is the magnitude of the acceleration due to gravity?

Answer 1

time in air:
hf=hi+vi'*t-1/2 a t^2
0=0+22.1sin18*7.40-1/2 a (7.40^2)
solve for a
a= 2*22.2*.309/7.40=1.85m/s^2 check that