Quiz #12

[ptatohed]

A car is traveling at 55 mph on a 10% downgrade. The driver's perception reaction time is 1.5 seconds. The coefficient of friction on the roadway is 0.55. The total distance, in feet, required to come to a complete stop during a panic stop is most nearly:

A.)275

B.)305

C.)345

D.)425

 

[nda]

V=55 mph

G=-0.10

t = 1.5 secs

f=0.55

SSD = (1.47*t*v)+V^2/{30(f-G)} = 1.47*1.5*55 + 55^2/{30(0.55-010)} = 345'

Pataohed, Thanks for the problem- I will wait for other people's inputs or the answer

 

[John QPE]

C

 

[The Wizard]

Nice problem, taterhead.

 

[ptatohed]

Good job guys..... C.