variation: what stopping distance corresponds to speed of...

[patti72458]

The stopping distance d of a car after the brakes have been applied varies directly as the square of the speed of r. If a car traveling 60 mph can stop in 200ft. What stopping distance corresponds to a speed of 36mph.

 

[stapel]

This one works just like the other one you posted. How far have you gotten in following the methodology of the worked solution that was provided?

Please include specifics. Thank you.

Eliz.

 

[skeeter]

Re: variation: what stopping distance corresponds to speed o

The stopping distance d of a car after the brakes have been applied varies directly as the square of the speed of r. If a car traveling 60 mph can stop in 200ft. What stopping distance corresponds to a speed of 36mph.

d = kr²

they gave you an "r" and a "d" ... find the constant of proportionality, "k", then you can ATQ.