Calculating Rain Velocity in Different Reference Frames for a Traveling Car

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Homework Help Overview

The problem involves calculating the velocity of rain in different reference frames, specifically for a car traveling east at a given speed while rain falls vertically. The scenario includes understanding the relationship between the car's motion and the rain's trajectory as observed from the car and the Earth.

Discussion Character

  • Exploratory, Conceptual clarification, Mathematical reasoning

Approaches and Questions Raised

  • Participants discuss the need to convert units from km/h to m/s and mention using trigonometry to analyze the situation. There is an emphasis on drawing a diagram to visualize the problem. Questions arise about the appropriate formulas to use and how to label the components of the triangle formed by the velocities.

Discussion Status

Some participants have made progress by converting the car's speed to m/s and identifying the angle involved. However, there is still uncertainty regarding the next steps and the specific formulas needed to find the velocities in the different reference frames. The discussion is ongoing with various interpretations being explored.

Contextual Notes

Participants express a lack of confidence in their physics skills and seek guidance on how to approach the problem. There is a focus on understanding the setup and the relationships between the velocities rather than solving the problem outright.

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A car travels due east with a speed of 35.0 km/h. Raindrops are falling at a constant speed vertically with respect to the Earth. The traces of the rain on the side windows of the car make an angle of 55.0° with the vertical. Find the velocity of the rain with respect to the following reference frames.



1. the car : ___m/s
2. the Earth: ___m/s



I don't know how to solve this problem. I am bad at physics and I can't find any formulas to save me. If some could help walk me through it, help me, or point me in the right direction, that'd be great. Thanks.
 
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first need to convert units from km/h to m/s. Then it is all trigonometry. Draw yourself a diagram and label you knowns and unknowns. Post what you come up with.
 
Ok, I converted 35km/h to m/s and I got 9.72222223. And I know the angle is 55 degrees. So, if I draw a triangle, I would label the angle between the hypotnues and adjacent 55 right?
I'm not sure what I am really supposed to draw or how I can convert 9.72222223 into the velocities I need.
 
Like, what formulas do I use to find the velocity in this problem?
 

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