Determine the conversion factor between (a) km/h and mi/h, (b) m/s and ft/s, and (c) km/h and m/s.

(a) km/h and mi/h,
1 km/hr (km hr-1) =  0.278 m/s (m s-1) = 0.621 mi/hr (mi hr-1)  = 0.912 ft/s (ft s-1)
 (b) m/s and ft/s,
Speed of sound in air at 0 oC (32 oF) =  331 m/s  (m s-1) =  1090 ft/s (ft s-1)  = 41 mi/hr (mi hr-1)
 (c) km/h and m/s. 1 km/hr (km hr-1) =  0.278 m/s (m s-1)  

If there was no gravity then their would be no downword force on the football to have it return the the grownd, and if there was no friction (mainly air friction) then there would be no opposing force the stop the ball from moving through the air allowing the ball to travle ∞.

Global warming was a major concern some people do not care global warming is fake it is not real the percentage of it happening  is slight