In this question use g=9.8g = 9.8g=9.8 m s−2^{-2}−2.
A golf ball is struck from a point on horizontal ground with speed 30 m s−1^{-1}−1 at an angle of 25° 25°\,25° above the horizontal. It lands on the same horizontal ground.
Find the time of flight of the ball.
State two modelling assumptions you have made.