a sports photographer has a 150 mm focal length lens on his camera.the photographer wants to photograph a sprinter running straight away from him at 5 m/s.what is the speed (in mm/s)of the sprinter's image at the instant the sprinter is 10 m in front of the lens?

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Irving HeathcoteLv2

15 Apr 2019

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a sports photographer has a 150 mm focal length lens on his camera.the photographer wants to photograph a sprinter running straight away from him at 5 m/s.what is the speed (in mm/s)of the sprinter's image at the instant the sprinter is 10 m in front of the lens?

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