A golf club contacts a ball for 0.15 s at angle to horizontal and the ball strikes ground distance from fairway. Initial speed 25 m/s and angle of projection is 15 degrees

Question

Calculate time between
1.ball leaving club and when it first touches ground
2.range of ball down fairway

Please direct me where to even start or show me some of the steps please

Answer 1

http://www.jiskha.com/display.cgi?id=1286217809

Answer 2

I have a question? What does hf = hi+Vivertical stand for? I haven't seen hf or hi or Vivertical yet in class-I just started a few weeks ago.

Thank you for the direction- -Sorry I didn't check what someone else asked-I guess I should have.