in sports(eg,cricket) what is the technique for measurement
of speed of the ball thrown by the bowler.
Answers were Sorted based on User's Feedback
Answer / naveed t p
Presently its measured using radar gun / speed gun, which
uses the principle of doppler shift (used in ultrasonic
flow meters - where shift in frequency is measure of ball
speed). Same principle is used by our trafic police for
measuring vehicle speed.
Also read kokaboora has developed a ball with inbuild
speedometer & small LCD on it, its still on test not
released for professional use.
Is This Answer Correct ? | 52 Yes | 5 No |
Answer / bikash mishra
Distance of the pictch/how much time it has taken to reach
batsman
Is This Answer Correct ? | 1 Yes | 10 No |
Answer / sania
by calculating the distance and time.
speed=distance of travelled by ball/time taken to reach
Is This Answer Correct ? | 7 Yes | 18 No |
Answer / ankushkhatri8@rediffmail.com
no such formula yet known
just grab the ball and use ur full strength to just crack he stumps
Is This Answer Correct ? | 4 Yes | 16 No |
Answer / sanjay kumar pal
in cricket speed of bowling is measured by measuring the
speed of rotating the hand of the bowler.
Is This Answer Correct ? | 5 Yes | 58 No |
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In 2 wire transmitter 1 wire is used for power and other is used for signal( 4-20)ma In 4 wire transmitter 2 wires are used for power and 2 wires are used for signal (4-20)ma . but my question is "what is the criteria or parameters we have to consider while selecting these transmitters for eg( distance, safety zones etc.
I saw one P&ID 6" control valve has been connected with 8" process line, and 2" valve also connected in parallel with 6" valve. why the 2" valve connected in parallel, Is there any technical reason. please clarify. With Regards-Kittu