Centripetal Force: Normal Contact Force & Velocity

[cloveryeah]

if the centripetal force can be only provided by normal contact force.

centripetal velocity is Vs. If V<Vs, then it will lose contact of the road?
Or it will lose contact when n=0? Or when n<0?

THX

 

[mfb]

What are V and n?
Is this homework?

 

[cloveryeah]

no it is not

v is just the velocity of the object and n is the normal force

i m just confusing on this concept

 

[A.T.]

n is the normal force

On a flat road, the normal force cannot act as the centripetal force.

 

[cloveryeah]

i mean at a road that have inclination

 

[jbriggs444]

i mean at a road that have inclination

In order for the normal force to be a centripetal force, the vehicle would need to be moving in a path that curves up away from the surface. If the road is flat, that means that the vehicle would need to lift off the road, even if the road were flat, but inclined.

["Flat" as A.T. intended it means that the road must stay in a single plane. In other words, it cannot curve vertically]

 

[Redbelly98]

i mean at a road that have inclination

Draw yourself a free-body (i.e. force) diagram for a car on an inclined, curved road. If the situation is what I think it is, there should be 3 forces: gravitational, normal force, and frictional force.

Any force that has a component toward or away from the center of the circular path contributes to the centripetal force.

 

[Chestermiller]

i mean at a road that have inclination

By this, do you mean that the road is banked?

Chet