Ball and club head contact time & velocity after launching the ball

[Thomas11]

Dear All,
I have a few inquiries for the physics of a golf ball.
(1) Can I assume that the ball has constant velocity after launching the ball?
Because there is no force when the ball is no longer contact with the club head.
(2) What is the estimated ball contact time with the club head? Is that related to club head speed?
Thanks,
Thomas

 

[spktho]

Coming from a Bio major, so not too up on physics:

1. Only in a vacuum. Air friction will cause a deceleration in flight.

2. Don't know the exact time, but form this site I remember the length traveled from initial contact with ball to separation is about 3/4" with a full swing. Club head speed is one factor as well as ball construction.

 

[Thomas11]

Coming from a Bio major, so not too up on physics:

1. Only in a vacuum. Air friction will cause a deceleration in flight.
The time interval I am interested is a few msec after the ball leaves the club head.
Assume that air friction is not dominant for that time interval. So I can consider the ball with constant velocity
Thanks,
Thomas

 

[Frans@France]

Velocity is not constant but all depends on the unit of measure. Same for the dwell time. In "standard" discussions it is assumed to be 0.5 milliseconds but in reality depends on face material (hence the cor restriction), ball, squareness of the impact etc.. Lots of literature to be found on these subjects.

link : http://www.wishongolf.com/faq_tech_answer.php?techKey=1