fizik
posted by
alya
.
1. A sports car travelling east at 48.0 m/s passes a trooper hiding at the roadside. The driver uniformly reduces his speed to 22 m/s in 4.10 s
a) Find the magnitude and direction of the carâ€™s acceleration as it slows down
b) Calculate the distance traveled during the 4.10 s time interval

fizik 
drwls
(a) a = [(22  48)m/s]/4.1s
= 6.3 m/s^2
(b) X = Vaverage*(4.1s) = 35 m/s*4.1s
= 143.5 m

fizik 
alya
can i know how to get Vaverage?

fizik 
drwls
Vav is the average of the initial and final velocities during deceleration.
It equals (Vinitial + Vfinal)/2