College Physics with MasteringPhysics 7th Edition by Jerry Wilson,Anthony Buffa,Bo Lou

Exercise 62

(a) A car traveling at a speed of v can brake to an emergency stop in a distance x. Assuming all other driving conditions are similar, if the traveling speed of the car doubles, the stopping distance will be (1)
, (2) 2 x , (3) 4 x. (b) A driver traveling at 40.0 km/h in a school zone can brake to an emergency stop in 3.00 m. What would be tire braking distance if the car were traveling at 60.0 km/h