# Calculations of bat speed and pace of a delivery

I have two questions:

1. How is the bat speed of batsmen calculated?

(I believe it is from change in position of bat in each frame divided by time)

2. 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?

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Bat speed in cricket is the velocity that a batter can achieve with his customized slab of English willow, But i believe there is no standard of how to measure it has been accepted. It is largely the television channels that measure the speed of bat and it is from the video their cameras capture. Its mostly the speed of swing from stationary position to hitting the ball position.

The nature of pitch surely affects the pace of ball. A dry dusty pitch and a very damp pitch is slower because the ball grips and holds to the surface more. A skiddy kind of pitch with a little moisture will have a slight increase in pace due lower value of coefficient of friction. The difference in pace caused by difference in the texture of the pitch is less than 5mph.

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Bat speed calculation is ok. But while calculating the speed of a delivery , it is calculated even before the ball hits the ground. so virtually the type of the pitch doesn't matter in calculating the speed, the nature of the pitch does matter to the batsmen alone , coz the d pace at which the ball reaches the batsmen will vary. in hard pitches like Perth the ball(with speed 140kmph) reaches the batsmen with good pace,while in sub continental pitches the same 140ks delivery looses speed after hitting the deck, arrives to the batsmen with much lesser speed. – gout Apr 2 '12 at 10:05