How far would the motorcycle travel before a person with 0.14 secs as a reaction time pulled the brake lever?

a motorcycle traveling at 55km/h would cover about 15m in a second.

Answer:

55km/hr 55000/3600 550/36 m/sec Distance traveled in 0.14 sec 0.14*550/36 ≈ 2.14 m

Vt 3.14(DN) where, Vt tangential velocity 35 miles/hrX5280ft/mileX1/60min/hr 3080ft/min. D 14 X2 inchesX1/12 inches/ft28/12 ft N Vt/{3.14}(28)[1/12] N 3080 ft/min/(3.14) [28](1/12)ft 3080[12]/(3.14)28 420.38 rpm.

The 14 radius wheel will travel (14 x 2 x 3.14) 87.92 per revolution. 35 mi (35 x 5280' x 12) 2217600. 221760 / 60 min. 36960 per min. 36960 / 87.92 420.38 revolutions per minute.

convert miles per hour into inches per minute. Then divide by 2 pi r.