A 281 lb fullback runs the 40 yd dash at a speed of 23.0 ± 0.1 mi/h.(a) What is his de Broglie wavelength (in meters)?(b) What is the uncertainty in his position?

Question

i determined the wavelength correctly, but how do you determine the uncertainty

Answer 1

wavelength = h/mv
± 0.1 mi/h

Answer 2

http://www.jiskha.com/display.cgi?id=1284677676