To start the control would be import to see how drivers would act with full focus on the road. The subjects should (in order for the only difference to be the phone) is to use the same vehicle same road same weather condition, just obviously one has the phone the other does not. I hope this helps
Will this one work?...................
The density will be 1.05
The mass will be 13.65
The answer would be 4, each kinetic equation has 4 variables
Answer:

Since the bar cannot translate, linear momentum is not conserved
Explanation:
By conservation of the angular momentum:
Lo = Lf

where


;
; d=1.6m; L=3m;
;
; 
Solving for
:

Replacing the values we get:

Since the bar can only rotate (it canno translate), only angular momentum is conserved.