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

AI Thread Summary
A golfer hits a ball at an initial speed of 109 km/h, and the discussion focuses on calculating the longest hole in one, the time the ball spends in the air, and the maximum height reached. The initial speed needs to be converted from km/h to meters per second for accurate calculations. Gravity is considered at -9.8 m/s², and the calculations involve using trigonometric functions and kinematic equations. The conversion and application of these equations are crucial for determining the correct answers to the posed questions. Accurate calculations are essential for understanding projectile motion in golf.
sophiegirl411
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Homework Statement



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

Homework Equations



gravity= -9.8 m/s

The Attempt at a Solution


109cos(45)=77.1 km/hr
t=77.1/g
9.8m/s *1/1000m *3600^2=127008
 
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sophiegirl411 said:

Homework Statement



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

Homework Equations



gravity= -9.8 m/s

The Attempt at a Solution


109cos(45)=77.1 km/hr
t=77.1/g
9.8m/s *1/1000m *3600^2=127008

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