How do I get acceleration, distance, and time?

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Homework Help Overview

The discussion revolves around a physics problem involving a car skidding to a stop after encountering an obstacle. The scenario includes parameters such as the car's speed, mass, and coefficients of friction, and seeks to determine the distance skidded before stopping.

Discussion Character

  • Exploratory, Conceptual clarification, Mathematical reasoning

Approaches and Questions Raised

  • Participants discuss identifying the significance of the given information and relevant equations. Some suggest breaking down the problem to understand the relationships between acceleration, velocity, and time.

Discussion Status

The conversation is ongoing, with participants offering guidance on how to approach the problem. There are multiple interpretations of the information and equations involved, and no explicit consensus has been reached yet.

Contextual Notes

Some participants express uncertainty about how to begin solving the problem, indicating a need for clarification on the application of Newton's Laws and the concepts of friction and acceleration.

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Homework Statement


While driving your car at 20 m/s (about 45 mph) along a country road one night, you suddenly see a deer in your headlights. Your car's mass is 1200 kg, and the coefficients of friction between its tires and the asphalt road are 0.4 and 0.6.
If you slam on your brakes and lock the wheels, how far will you skid before stopping if the road is level?
I have no idea on how or where to start.

Homework Equations

The Attempt at a Solution

 
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Take a second and step back, then write down what each number of information represents. then see what equations use the information. Then make an attempt to solve
 
NkaujHelp said:

Homework Statement


While driving your car at 20 m/s (about 45 mph) along a country road one night, you suddenly see a deer in your headlights. Your car's mass is 1200 kg, and the coefficients of friction between its tires and the asphalt road are 0.4 and 0.6.
If you slam on your brakes and lock the wheels, how far will you skid before stopping if the road is level?
I have no idea on how or where to start.

Homework Equations

The Attempt at a Solution

Certainly you know something.

Newton's Laws, friction, acceleration, velocity, time ...

How are they related?
 
Try using ΣF=Δp/Δt. You should find Δt from this equation. Then you use this one to find the acceleration: v=u-at. Can you find out what comes next?
 
Last edited:

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