Question
a bus slams on brakes to avoid an acciden.the tread marks of the tires are 80 meter long. if coefficient of kinetic friction is 0.7, what was the speed before applying the brakes?
Answers
Damon
Force * distance = change in KE
m g * .7 * 80 = (1/2) m v^2
m cancels, solve for v
m g * .7 * 80 = (1/2) m v^2
m cancels, solve for v