# physics

posted by .

Determine the stopping distances for an automobile going a constant initial speed of 97km/h and human reaction time of 0.50s , for an acceleration a=−6.5m/s2

• physics -

***Convert initial speed to m/s

a=-6.5m/s^2
Vf=0
d=?
***Vi=97km/h*(10^3m/1km)*(1h/3600s)=27m/s

Use the following equation and solve for d:

0^2=(27m/s)^2+2(-6.5m/s^2)d

729=13d

Solving for d,

729/13=d

d=56m

• physics -

correct.

• physics -

wrong

• physics -

devron you suck

## Similar Questions

1. ### physics

determine the stopping distances for an auto0mobile with the initial speed of 90km/hand the human reaction time of 1.0s: (a) for an acceleration a= -40m/s^2; (b) for a = -8.0m/s^2 use one of newtons four equations to solve.... i don't …
2. ### Physics

Determine the stopping distances for an automobile with an initial speed of 95km/h and human reaction time of 1.0s: (a) for an acceleration a= -5.2m/s^2 (b) for a= -6.7m/s^2
3. ### physics

Determine the stopping distances for an automobile with an initial speed of 95km/h and human reaction time of 1.0s: (a) for an acceleration a= -5.2m/s^2 (b) for a= -6.7m/s^2
4. ### physics

Determine the stopping distances for a car with an initial speed of 93 km/h and human reaction time of 3.0 s for the following accelerations: -4.00 m/s^2 -8.00 m/s^2
5. ### Physics

I really don't get why I am getting this question wrong?
6. ### Physics

I really don't get why I am getting this question wrong?
7. ### Physics

I really don't get why I am getting this question wrong?
8. ### Physics

I really don't get why I am getting this question wrong?
9. ### Physics

Determine the stopping distances for a car with an initial speed of 93 km/h & human reaction time of 0.80 s, for an acceleration a=−4.0m/s2.?
10. ### physics hw

Determine the stopping distances for a car with an initial speed of 87 km/h and human reaction time of 2.0 s for the following accelerations. (a) a = -4.0 m/s2 (b) a = -8.0 m/s2

More Similar Questions