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Homework Help: Golf ball equation for Projectile Motion need to know if I am doing it correctly

  1. Sep 28, 2011 #1
    1. The problem statement, all variables and given/known data

    A golfer hits the ball with an initial speed of 109km/hr
    A) What is the longest hole in one (in km) that he golfer can make without the ball rolling?
    B)How much time does the ball spend in the air
    C) What is the maximum height reached by the ball

    2. Relevant equations

    gravity= -9.8 m/s

    3. The attempt at a solution
    109cos(45)=77.1 km/hr
    9.8m/s *1/1000m *3600^2=127008
  2. jcsd
  3. Sep 28, 2011 #2


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    Homework Helper

    If g = 9.81, you need to change 109 km/h into metres per second
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