USA Bus Lines

A bus is moving at 25m/s. The driver steps on the bakes and the bus stops in 3.0s. What is the averag.....?

A bus is moving at 25m/s. The driver steps on the bakes and the bus stops in 3.0s. What is the average acceleration of the bus while braking? How far did the bus travel in that time period? please show me how to do this question and not just the answer for future questions

Public Comments

1. << What is the average acceleration of the bus while braking? >> Working formula is a = (Vf - Vo)/T where a = acceleration Vf = final velocity = 0 (when bus stops) Vo = initial velocity = 25 m/sec (given) T = stopping time = 3 sec (given) Substituting values, a = (0 - 25)/3 = - 8.33 m/sec^2 NOTE -- the negative sign attached to the acceleration is merely an indication that the bus was (obviously) slowing down when the brakes were applied. << How far did the bus travel in that time period? >> Working formula is X = VoT + (1/2)(a)T^2 where X = distance travelled by bus during the braking period and all the other terms have been previously defined. Substituting appropriate values, X = 25(3) + (1/2)(-8.33)(3^2) X = 37.52 meters Hope this helps.