# Definition of 'with the vertical' in this question?

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1. Mar 20, 2017

### ehf

1. The problem statement, all variables and given/known data

(please ignore something that is not english)
2. Relevant equations
ac=v^2/r
(b) is the problem...
3. The attempt at a solution
what is 'with the vertical' here? the direction/opposite of ac or the direction of v?

2. Mar 20, 2017

### .Scott

It means the angle with the vertical. So a strictly vertical force downward would be 0 degrees. A strictly horizontal (sliding) force would be 90 degrees.

3. Mar 20, 2017

### ehf

sliding=horizontal=velocity direction and vertical=ac direction then?

4. Mar 20, 2017

### .Scott

The force applied to the car by the pavement will consist of 2 components:
- 1) There will be a vertical component that supports the mass of the car against gravity.
- 2) There will be a horizontal centripetal force that holds the car along its circular path.

The angle of the total force against the car with vertical will be an arc tangent of the ratio of these forces.

5. Mar 21, 2017

### ehf

Oh thank you now I understand the meaning