Race-track turns are often "banked" (tilted inward) so that cars can take them at high speed without skidding. consider a circular track 2km in length banked at an angle of 20o , and just for fun suppose the track is covered in ice (after a bad storm, lets say). with what speed does a car have to drive in order to make it around the track?

33.7 m/s

Explanation:

Given

circumference of track= 2km=2000 m

thus radius r=318.26 m

Banking

Let R be the reaction force

Thus ---1

----2

divide 1 & 2 we get

v=33.7 m/s

an electric circuit

this is an example of "committed" time.

committed time, as contracted time, takes need over essential and available time since it is seen as profitable work. it alludes to the time allotted to keep up a home and family. at the point when a man is commuting using committed time this individual may feel that the drive is an obligation to family, for example, strolling youngsters to class or driving a mate to work. contracted and committed time clients may feel that their commute could really compare to the commute of important or leisure time clients on the grounds that their commute is profitable work. in this manner, they might be more disposed to pick a mechanized method of movement.