describe two electronic methods by which velocity of flying object can be measured?

Question

measuring instruments and metrology

Answer 1

Typically you can use a radar gun which is pointed at the moving object to see the return time of the radar echo (popular with pitched baseballs) or have the object pass a starting location and a stopping location with a timer between them to count the time of flight and display it as speed (popular with bullets).

Answer 2

If the object needs to know its own velocity you can use ultrasonic sensors to determine the air speed by firing the ultrasonic sensor at a detector in the direction of flight and determine the airspeed over a defined distance then subtract the speed of sound from the calculation and airspeed should be the answer

Answer 3

one million. Use a radar gun like the police use. i think those at the instant are not too puzzling to purchase or lease. 2. Fly the object between 2 laser beams which degree the linked fee of the object (how long it takes to pass a prevalent distance).