Traveling at a speed of 16.1 m/s, the driver of an automobile suddenly locks the wheels by slamming on the brakes. the coefficient of kinetic friction between the tires and the road is 0.720. what is the speed of the automobile after 1.30 s have elapsed? ignore the effects of air resistance.

6.92 m/s

Explanation:

Given

initial velocity

coefficient of kinetic Friction

time interval

Let final velocity be

maximum acceleration

using

the displacement produced by the body.  

the amount of force subjected to the body.  

the angle between the direction of force and displacement

d₁ = displacement of tern from arctic to antarctic = 11000 miles

d₂ = displacement of tern from antarctic to arctic =   - 11000 miles

d = total displacement for the journey

total displacement for the journey is given as

d = d₁ + d₂

d = 11000 + (-11000)

d = 0 miles

t₁ = time of travel from arctic to antarctic = 3 months = 3 x 30 days = 90 days

t₂ = time of travel from antarctic to arctic = 3 months = 3 x 30 days = 90 days

t = total time of travel

total time of travel is given as

t = t₁ + t₂

t = 90 + 90

t = 180 days

average velocity is given as

average velocity = total displacement/ total time

v = d/t

v = 0/180

v = 0 miles/day