Uniform Circular Motion of streetcar

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Homework Help Overview

The discussion revolves around a physics problem involving uniform circular motion, specifically analyzing the forces acting on hand straps of a streetcar as it rounds a corner. The original poster seeks assistance in understanding the relationship between the motion of the streetcar and the angle formed by the hand straps with the vertical.

Discussion Character

  • Exploratory, Conceptual clarification, Assumption checking

Approaches and Questions Raised

  • Participants discuss the forces acting on the hand straps, including centripetal acceleration and gravity. There are questions about the resultant force direction and the relationship between the forces and the angle with the vertical.

Discussion Status

The discussion is active, with participants providing guidance on the importance of considering both centripetal acceleration and gravitational force. There is an exploration of the correct approach to calculating the angle, with some clarification on the relationship between the forces involved.

Contextual Notes

Participants are working under the constraints of a homework problem, which may limit the information available and the methods they can employ. There is an emphasis on understanding the conceptual framework rather than arriving at a final solution.

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An old streetcar rounds a flat corner of radius = 9.1m at 4.444 m/s.
What angle with the vertical will be made by the loosely hanging hand straps.

I don't really know what I am looking for, Can anyone Help?
 
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Start by drawing a diagram. What forces are acting on the hand straps? Think why the hand straps should form any angle with the vertical.
 
centripetal acceleration would act on the handstraps
a = vsquared/r

a=2.1m/s(squared)

is that all that acts on them
 
Almost. What keeps the car (and the hand straps, and pretty much everything else) on ground? :smile:
 
Gravity ?
 
Yep.
Now, the direction of the resultant force?
 
could i do this:

tan(theta) = 9.8m/s(squared) / 2.1m/s(squared
 
Yes, but as the requested angle was the angle with the vertical (not horizontal), you should switch the forces' (accelerations', as mass cancels out) places.
 
ohhh..oops..thats what i meant in the first place

Thanks
 

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