velocity of the cue, ball

[Brems]

what is a normal velocity for a cueball when you knock it hard with the cue and when you knock it gentle ( 1m/s 0.2m/s,...) this is for my thesis

[mooneyy]

Brems, I'd suggest you open one thread for your thesis instead of one for each question you have.

I'm sure there can be no absolute answer to this question here as 'hard' and 'gentle' are relative terms.

You could however measure the time it takes for a cue ball to travel from the baulk line to the top cushion, so you can calculate the velocity based on time and distance, both of which are known in this case.

Of course the ball will be faster immediately after the strike and slow down towards the cushion, but for a 'hard' stroke this effect should be negligible. For the 'gentle' stroke just reduce the distance to the cushion and you should get an approximate velocity too.

[RGCirencester]

I was going to suggest that.
Perhaps use a video camera so you can stop through if you find it too hard to time a hard shot just with a stopwatch

[warren132]

Remember watching Tomorrows World in the mid to late 80's and Steve Davis was on the program trying out something similar. I think they worked out that no matter how hard you can hit the white ball on the 12 by 6 playing surface it cant travel more than 18mph. hope this helps answer a bit of your question.

[narl]

Remember watching Tomorrows World in the mid to late 80's and Steve Davis was on the program trying out something similar. I think they worked out that no matter how hard you can hit the white ball on the 12 by 6 playing surface it cant travel more than 18mph. hope this helps answer a bit of your question.

Would be different these days with the faster cloth, Nic Barrow in one vid said something like 25mph but that's more than likely slamming it like you're breaking for 9 ball.

[Maxsys]

Would be different these days with the faster cloth, Nic Barrow in one vid said something like 25mph but that's more than likely slamming it like you're breaking for 9 ball.

Or as my mate says, "What's he doing, making his own pocket?"