The speed required to hit a golf ball a distance of 400 yards can vary depending on factors such as the type of club being used, the golfer's skill level, and environmental conditions. However, I can provide you with a general estimate.
On the professional level, skilled golfers can achieve ball speeds of around 160 to 180 miles per hour (mph) with a driver. In some cases, extremely skilled golfers have been known to reach ball speeds of over 200 mph. These ball speeds are typically achieved by combining a high swing speed with an efficient swing technique and optimal impact conditions.
It's important to note that swing speed alone doesn't determine the distance a golf ball will travel. Factors such as launch angle, spin rate, and ball construction also play significant roles. Additionally, environmental factors like wind direction and speed can affect the ball's trajectory and distance.
For the average golfer, achieving a swing speed of 100 to 120 mph with a driver is considered quite fast. With this level of swing speed and optimal conditions, it's possible to hit a golf ball a distance of around 250 to 300 yards. Hitting the ball 400 yards would require an exceptional combination of swing speed, technique, and favorable conditions.
Keep in mind that these estimates are general and individual results may vary. Factors such as physical fitness, flexibility, and practice can all contribute to increasing swing speed. Working with a golf professional or instructor can help improve swing mechanics and maximize distance potential.