How Is Collision Speed Calculated in a Supermarket Parking Lot Incident?

In summary, coordinate transformations are a mathematical process used to convert coordinates from one system to another. They are important because they allow us to represent data and locations in different coordinate systems, making it easier to compare and analyze information. Some common coordinate systems used in coordinate transformations include Cartesian, geographic, and polar coordinates. They are used in scientific research to analyze and visualize data in different coordinate systems, and to accurately describe and model the physical world. However, there are potential pitfalls to be aware of, such as errors in data entry or calculation, differences in coordinate system definitions, and the possibility of introducing distortion or loss of precision. It is important to carefully choose the appropriate transformation method and double-check the results for accuracy.
  • #1
melmel7880
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0

Homework Statement


On a supermarket parking lot, a car is pulling out and bumping into an oncoming car. The car pulls out with 0.8 m/s, while the oncoming car has a speed of 1.2 m/s. The angle between the velocities is 24 degrees, as indicated in the figure. What is the collision speed?


Homework Equations





The Attempt at a Solution

 
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  • #2
Welcome to PF!

Hi melmel7880! Welcome to PF! :wink:

Relative velocities are vectors, so use a vector triangle …

you are given the lengths of two sides, and the angle between, and you want the third length …

what do you get? :smile:
 
  • #3


To solve this problem, we need to use coordinate transformations to find the relative velocity between the two cars. First, we can define a coordinate system with the x-axis parallel to the initial velocity of the car pulling out and the y-axis perpendicular to the x-axis. We can then use the formula for vector addition to find the relative velocity between the two cars:

Vrel = √(V1^2 + V2^2 - 2V1V2cosθ)

Where V1 and V2 are the magnitudes of the initial velocities and θ is the angle between them. Plugging in the values given in the problem, we get:

Vrel = √(0.8^2 + 1.2^2 - 2(0.8)(1.2)cos24) = 1.21 m/s

Therefore, the collision speed between the two cars is 1.21 m/s.
 

1. What is a coordinate transformation?

A coordinate transformation is a mathematical process used to convert coordinates from one system to another. It involves changing the units, orientation, or position of the coordinates while maintaining the same underlying location or object.

2. Why are coordinate transformations important?

Coordinate transformations are important because they allow us to represent the same data or location in different coordinate systems, making it easier to compare and analyze data from different sources. They also help us to navigate and map our physical world.

3. What are some common coordinate systems used in coordinate transformations?

Some common coordinate systems used in coordinate transformations include Cartesian (x, y, z) coordinates, geographic coordinates (latitude and longitude), and polar coordinates (r, θ).

4. How are coordinate transformations used in scientific research?

Coordinate transformations are used in scientific research to analyze data from different sources or to create visual representations of data in different coordinate systems. They are also used in various fields such as geology, astronomy, and physics to accurately describe and model the physical world.

5. Are there any pitfalls to be aware of when performing coordinate transformations?

Yes, there are some pitfalls to be aware of when performing coordinate transformations. These include potential errors in data entry or calculation, differences in coordinate system definitions, and the possibility of introducing distortion or loss of precision in the transformation process. It is important to carefully choose the appropriate transformation method and to double-check the results for accuracy.

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