- #1
Spydermonkey
- 11
- 0
Homework Statement
The "reaction time" of the average automobile driver is about 0.700 . (The reaction time is the interval between the perception of a signal to stop and the application of the brakes.) If an automobile can slow down with an acceleration of 12.0 , compute the total distance covered in coming to a stop after a signal is observed (a) from an initial velocity of 15.0 (in a school zone) and (b) from an initial velocity of 55.0 .
x=?
xo=?
vx=0, point at which you are stopped
vxo=15 mi/h initial speed
ax=-12 ft/s^2
t=?
Homework Equations
v=d/t
vx^2=vxo^2+2ax(x-xo)
The Attempt at a Solution
I am pretty much lost, I tried converting everything to meters as that is what the answers call for, and got the equation
vx^2-vxo/2ax= (0)^2 -(6.7056)^2/ 2(-3.6576)= 6.1468 meters