Automobile velocity on the bridge

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Homework Help Overview

The problem involves an automobile with a specified mass and initial velocity approaching a bridge with a curvature radius. The question seeks to determine the velocity of the automobile at the top of the bridge.

Discussion Character

  • Assumption checking, Problem interpretation

Approaches and Questions Raised

  • Participants discuss the implications of the car's speed at the bridge apex and question the sufficiency of the provided information, particularly regarding the height of the bridge and the car's gear status.

Discussion Status

The discussion is exploring the limitations of the problem as presented, with participants noting the lack of necessary information to arrive at a definitive answer. Some guidance has been offered regarding the conditions affecting the car's velocity, but no consensus has been reached on the problem's validity.

Contextual Notes

Participants highlight the absence of critical details, such as the height of the bridge, which is essential for solving the problem. There is also uncertainty about whether the car's gear is in neutral throughout the scenario.

Juraj S
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Homework Statement



Automobile with m = 1000kg, traveling at v = 54km/h got to the bridge with curvature radius r = 50m. What is its velocity at the top of the bridge?

Homework Equations

The Attempt at a Solution


bb1ed04857417ac4fefa7824e7177778.png


If this solution is correct, could you please explain to me how can this velocity be higher than the initial speed of the automobile?
 
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Hi Juraj S. :welcome:

What you have calculated is the maximum speed (at the bridge apex) before the car's wheels would lose contact with the road.

How high is the bridge?

Hint: is the car's gear stick in "neutral" for all the time the car is on the bridge?
 
The question makes no sense, there is clearly not enough information. Even if we assume the car is in neutral, we've no way to determine the height of the bridge. Is this the whole problem, exactly as given to you?
 
That is exactly what I thought, that is why the solution I provided is the most I could come up with, so I guess the problem is incorrectly given because the info I provided is all I have available.
 

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