Sasha is driving straight and notices an antelope in the road a ways off. Determine the stopping distance (from the time she sees the antelope) for her car with an initial speed of 95 km/hr and an acceleration of -4.0 m/s2. Sasha's reaction time to start breaking is 1.0 second.

Answer 1

recall that the equation for distance is

s = vt + a/2 t^2

95 km/hr = 26.39 m/s
So, it will take 26.39/4 = 6 seconds of braking to stop.

s = 95*7 - 2*6^2 = 593 meters to stop

I guess she had good eyes, seeing an antelope at half a km away! Or, maybe she just hit it, or swerved past at the end...

Answer 2

sorry. 26.39/4 = 6.59

don't know how I got so far off. So, fix t and redo the calculation...