I have two questions:
How is the bat speed of batsmen calculated?
(I believe it is from change in position of bat in each frame divided by time)
Does the nature of the pitch affect the pace of a bowler? (I know that ball behaves differently on different pitches after hitting the deck)
Generally the pace is calculated as distance taken by the ball till pitching or hitting the bat divided by the time taken; as the speed is calculated before the ball pitches the ground, Will the nature of the pitch/ground/soil play any significant role in the pace of a delivery?